02001nas a2200253   4500008004100000022001400041245008300055210006900138260006800207300001200275490000700287520113000294653002201424653001601446653002201462653002101484653001501505100002501520700002001545700002201565700001801587700002501605856011701630       2005                        eng d  a0021-899500aThermal degradation kinetics of polyesters containing mesogenic aromatic diols0 aThermal degradation kinetics of polyesters containing mesogenic   a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcAUG  a784-7920 v973 a<p>A series of polyesters were synthesized by reacting structurally differing aromatic diols with either saturated (flexible) or unsaturated (rigid) dicarboxylic acid halide by a stirred interfacial polycondensation technique. Thermal degradation kinetics of these polyesters were investigated by applying Coats-Redfern and Horowitz-Metzger nonisothermal procedures. The dynamic thermogravimetry experiments were conducted in nitrogen to obtain differential thermogravimetric plots. Thermal stability of these polyesters was discussed on the basis of semiquantitative methods such as differential procedural decomposition temperature, integral procedural decomposition temperature, and fraction decomposition temperature (e.g., 10 % DT). Degradation proceeded in multiple stages. The thermal degradation patterns and activation energies in these stages were discussed in relation to central bridging moieties of aromatic diol. The activation energies of these polyesters were found to be in the range of 100 to 200 kJ/mol. The effect of spacer type on activation energy was also reported. (c) 2005 Wiley Periodicals, Inc.</p>10aActivation energy10aDegradation10akinetics (polym.)10aPolycondensation10apolyesters1 aMule, Smita, Atmaram1 aGhadage, R., S.1 aJacob, Nalini, E.1 aRajan, C., R.1 aPonrathnam, Surendra  uhttps://library.ncl.res.in/content/thermal-degradation-kinetics-polyesters-containing-mesogenic-aromatic-diols-001896nas a2200229   4500008004100000022001400041245008700055210006900142260006800211300001400279490000800293520106100301653002701362653002101389653001701410100002201427700002801449700003101477700001801508700001901526856012101545       2006                        eng d  a0021-899500aThermotropic behavior of lithocholic acid derivative linked hydroxyethyl cellulose0 aThermotropic behavior of lithocholic acid derivative linked hydr  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAY  a1995-20010 v1003 a<p>Various mesogenic lithocholic acid (LA) derivatives [3-acetyl LA (LAAC); 3-propionyl LA (LAP), 3-cinnamoyl LA (LACin); 3-benzoyl LA (LAB), 3-(4-nitrobenzoyl) LA (LANB); and methyl-3-(3-carboxypropionyl) LA, i.e., LA methyl ester monosuccinate (LAMeMS)] were reacted with hydroxyethyl cellulose (HEC) to obtain a series of LA derivatives of HEC. These polymers were characterized by the mesogen content, 1.1, differential scanning calorimetry, and hot-stage coupled polarizing optical microscopy. The degree Of Substitution (DS) ranged from 0.27 to 1.11. Polymers HEC-LAB (DS = 1.11), HEC-LANB (DS = 0.80), HEC-LACin (DS = 0.76), and HEC-LAP (DS = 0.27) exhibited a mesophase on heating whereas HEC-LAB also showed a mesophase on cooling. The other polymers HEC-LAAC (DS = 0.89) and HEC-LAMeMS (DS = 0.36) did not reveal mesophase formation with either heating or cooling. It is observed that the formation of a mesophase is affected by the type of mesogen that is used rather than the mesogen content of the polymer. (c) 2006 Wiley Periodicals, Inc.</p>10ahydroxyethyl cellulose10alithocholic acid10athermotropic1 aShaikh, V., A. E.1 aMaldar, Noormahamad, N.1 aLonikar, Shrikant, Vitthal1 aRajan, C., R.1 aPonrathnam, S.  uhttps://library.ncl.res.in/content/thermotropic-behavior-lithocholic-acid-derivative-linked-hydroxyethyl-cellulose-101492nas a2200289   4500008004100000022001400041245009900055210006900154260013100223300001200354490000700366520045200373653001600825653001400841653001000855653002100865653002200886100001800908700002200926700001700948700002400965700002600989700001801015700002501033700001801058856012601076       2007                        eng d  a0972-853800aMacroporous beads for lipase immobilization: kinetic resolution of a racemic drug intermediate0 aMacroporous beads for lipase immobilization kinetic resolution o  aDIV FRUITS & HORTICULTURAL TECHNOL, INDIAN AGRICULTURAL RESEARCH INST, NEW DELHI, 110 012, INDIAbHORTICULTURAL SOC INDIAcMAR  a174-1940 v223 a<p>{Lipase isolated from Arthrobacter sp. (RRLJ-1, MTCC No. 5125, named ABL), is effective in resolving a wide range of racemic drug intermediates. In this study, ABL was immobilized on a series of synthetic macroporous epoxy copolymers beads with varying pore sizes, surface area and hydrophobicity. Poly(glycidyl methacrylate-co-ethylene dimethacrylate) beads, with 75% crosslink density and 10% of epoxy groups modified with dibutyl amine [</p>10aauxin pulse10acoco-peat10agrape10amicropropagation10aplantlet survival1 aBhushan, Indu1 aParshad, Rajinder1 aQazi, G., N.1 aIngavle, Ganesh, C.1 aJamalpure, Trupti, M.1 aRajan, C., R.1 aPonrathnam, Surendra1 aGupta, V., K.  uhttps://library.ncl.res.in/content/macroporous-beads-lipase-immobilization-kinetic-resolution-racemic-drug-intermediate-003050nas a2200289   4500008004100000022001400041245012900055210006900184260009900253300001200352490000700364520194100371653004402312653002202356653002902378653004002407653001902447653001102466100001802477700002202495700002202517700002402539700001802563700002602581700002402607856012902631       2008                        eng d  a1359-511300aLipase enzyme immobilization on synthetic beaded macroporous copolymers for kinetic resolution of chiral drugs intermediates0 aLipase enzyme immobilization on synthetic beaded macroporous cop  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcAPR  a321-3300 v433 a<p>Lipase isolated from Arthrobacter sp. (bacterial strain, MTCC No. 5125) at RRL Jammu, being used for various process development. Arthrobacter sp. lipase (ABL) now has been immobilized on synthetic polymers and reused many a times. In this investigation number of various synthetic macroporous alkylated glycidyl epoxy copolymers with varying hydrophobicity, pore volume and surface area were prepared and used for this study. Among all the polymers prepared and used only two epoxy polymers GMA-EGDM 75-20(I) and GMA-EGDM 75-30(I) with particle size in the range of 150-450 nm, epoxy groups 80 and 70%, tertiary amino groups 20 and 30% was found suitable for immobilization of lipase (ABL). Dibutyl amine (DBA) incorporation created an internal pore radii 20-50 nm and hydrophobic microenvironment in both the polymers for binding the enzyme, which led to improvement in stability and enatioselectivity in racemic resolution process especially by binding to one of the isomers. The optimal ABL binding capacity of polymer GMA-EGDM 75-20(I) was 60 units, 34 mg protein and GMA-EGDM 75-30(l) was 36 units, 21 mg protein/g polymer. The immobilized lipase matrices displayed enhanced pH, thermal, organic solvent and long-term storage stability. Both the immobilized enzyme matrices were tested firstly for the hydrolysis of triglycerides using tributyrin as substrate. After testing, both the matrices were reused for racemic resolution of ethyl-3-hydroxy-3-phenyl propanoate (fluoxetine intermediate, an antidepressant drug) and racemic chiral auxiliary, acetyl-1-phenyl ethanol (intermediate of many chiral drugs) for 15 cycles. These immobilized lipase matrices have shown very high stability on recycling, high-enantioselectivity, high conversion and faster recovery of product compare to free enzyme, therefore these matrices may find use in kinetic resolution process developments. (C) 2007 Elsevier Ltd. All rights reserved.</p>10a1-phenyl ethanol and enantioselectivity10achiral resolution10aenantiomeric excess (ee)10aethyl-3-hydroxy-3-phenyl propanoate10aImmobilization10aLipase1 aBhushan, Indu1 aParshad, Rajinder1 aQazi, Gulam, Nabi1 aIngavle, Ganesh, C.1 aRajan, C., R.1 aPonrathnam, Surendera1 aGupta, Vijay, Kumar  uhttps://library.ncl.res.in/content/lipase-enzyme-immobilization-synthetic-beaded-macroporous-copolymers-kinetic-resolution-002221nas a2200277   4500008004100000022001400041245010000055210006900155260010600224300001000330490000700340520121500347653002701562653002201589653002301611653001901634653002001653100001801673700002201691700001801713700002401731700002101755700001801776700001901794856013001813       2009                        eng d  a0968-089600aArthrobacter sp lipase immobilization for preparation of enantiopure masked beta-amino alcohols0 aArthrobacter sp lipase immobilization for preparation of enantio  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJAN  a29-340 v173 a<p>Recent reports on immobilization of lipase from Arthrobacter sp. (ABL, MTCC 5125; IIIM isolate) on insoluble polymers have shown altered properties including stability and enantioselectivity. Present work demonstrates a facile method for the preparation of enantiopure beta-amino alcohols by modulation of ABL enzyme properties via immobilization on insoluble as well as soluble supports using entrapment/covalent binding techniques. Efficacies of immobilized ABL on insoluble supports prepared from tetraethylorthosilicate/aminopropyltriethoxy silane and soluble supports derived from copolymerization of N-vinyl pyrrolidone-allylglycidyl ether (ANP type)/N-vinyl pyrrolidone-glycidyl methacrylate ( GNP type) for kinetic resolution of masked beta-amino alcohols have been studied vis-a-vis free ABL enzyme/wet cell biomass. The immobilized lipase on different insoluble/soluble supports has shown 21 - 110 mg/g protein binding and 30 - 700 U/g activity for hydrolyzing tributyrin substrate. The findings have shown a significant enhancement in enantioselectivity (ee 99%) vis-a-vis wet cell biomass providing ee 70-90% for resolution of beta-amino alcohols. (c) 2008 Elsevier Ltd. All rights reserved.</p>10aArthrobacter sp lipase10abeta-Aminoalcohol10aEnantioselectivity10aImmobilization10asoluble polymer1 aChaubey, Asha1 aParshad, Rajinder1 aGupta, Pankaj1 aTaneja, Subhash, C.1 aQazi, Ghulam, N.1 aRajan, C., R.1 aPonrathnam, S.  uhttps://library.ncl.res.in/content/arthrobacter-sp-lipase-immobilization-preparation-enantiopure-masked-beta-amino-alcohols-001860nas a2200181   4500008004100000022001400041245013100055210006900186260005700255300001400312490000700326520111700333100002901450700003001479700001901509700001801528856013201546       2011                        eng d  a0022-246100aSynthesis and photopolymerization kinetics of linear alicyclic urethane acrylate macromonomer in presence of reactive diluents0 aSynthesis and photopolymerization kinetics of linear alicyclic u  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcAPR  a2221-22280 v463 a<p>This study deals with the photopolymerization of a macromonomer in the presence of reactive diluents using Photo Differential Scanning Calorimetry or Photo DSC. The kinetic profiles of these systems showed that the rate of photopolymerization rapidly increases at very early stages of the reaction. The rate of reaction was further found to increase with the addition of crosslinking agents. The addition of trifunctional crosslinking agent to the macromonomeric formulation resulted in a higher polymerization rate and conversion than that of a difunctional crosslinking agent. From the heat flow profiles, the kinetic parameters such as induction time, time to attain peak maximum, rate of maximum polymerization, and final conversion were noted for all the formulations. The initiation of photopolymerization was found to depend on the functionality while the in situ viscosity controlled the time scale for reaction diffusion which resulted in varying levels of conversions. Other parameters such as effect of temperature and concentration of photoinitiator on photocuring kinetics are also discussed.</p>1 aHarikrishna, Reghunathan1 aBhosle, Sonali, Madhavrao1 aPonrathnam, S.1 aRajan, C., R.  uhttps://library.ncl.res.in/content/synthesis-and-photopolymerization-kinetics-linear-alicyclic-urethane-acrylate-macromonomer-002043nas a2200253   4500008004100000022001400041245008800055210006900143260007400212300000900286490000700295520112300302653003401425653001401459653002401473653003301497100002701530700003001557700001901587700001801606700001901624700002901643856011701672       2012                        eng d  a1022-976000aPhotopolymerization kinetics of 2-phenylethyl (meth) acrylates studied by photo DSC0 aPhotopolymerization kinetics of 2phenylethyl meth acrylates stud  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJAN  a98110 v193 a<p>The present work deals with the photopolymerization of 2-phenylethyl (meth)acrylates and estimation of their kinetic parameters. Formulations were made by independently homogenizing the monomers with photoinitiators of two different classes. Two different compositions of photoinitiators were used to study the effect of concentration of photoinitiator on cure kinetics. These compositions obtained were tested for photo curing performance using differential photocalorimetry (DPC) or photo DSC under polychromatic radiation. The heat flow against time was recorded for all formulations under isothermal conditions and the rates of polymerization as well as the percentage conversions were estimated. It was observed that due to a longer timescale for reaction diffusion, the methacrylate formulations showed a higher conversion than acrylate formulations. Other parameters such as induction time, maximum rate and conversion attained as well as the time to attain peak maximum were noted. The photopolymerization and kinetic estimations of the formulations including evaluation of kinetic models are discussed.</p>10aBimolecular termination model10aPhoto DSC10aPhotopolymerization10aVariable autocatalytic model1 aGhorpade, Ravindra, V.1 aBhosle, Sonali, Madhavrao1 aPonrathnam, S.1 aRajan, C., R.1 aChavan, Nayaku1 aHarikrishna, Reghunathan  uhttps://library.ncl.res.in/content/photopolymerization-kinetics-2-phenylethyl-meth-acrylates-studied-photo-dsc-001871nas a2200229   4500008004100000022001400041245017100055210006900226260007400295300001200369490000800381520094500389653002401334653001301358653003101371653002401402100002901426700001901455700001801474700001801492856013101510       2013                        eng d  a1388-615000aPhotopolymerization of bis-aromatic and alicyclic based solid urethane acrylate macromonomer in the presence of large excess of reactive diluent Kinetics and modeling0 aPhotopolymerization of bisaromatic and alicyclic based solid ure  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcMAY  a805-8130 v1123 a<p>A solid urethane acrylate macromonomer with bis-aromatic as well as alicyclic moieties was synthesized and the kinetics of photopolymerization reactions were studied in the presence of varying concentration of photoinitiator and large excess of reactive diluent using photo DSC. The studies show that the rate of maximum polymerization was found to increase with increase in concentration of photoinitiator while a decrease was observed by an increase in temperature. The final conversion showed a decrease at highest isothermal condition due to vitrification. Estimation of kinetic parameters including applicability of autocatalytic and modified autocatalytic models were investigated by nonlinear regression. It was observed that the modified models gave a better fit with the experimental data and kinetic parameters showed a decrease with increase in temperature and an increase with increase in concentration of photoinitiator.</p>10aAutocatalytic model10akinetics10aLevenberg-Marquardt method10aPhotopolymerization1 aHarikrishna, Reghunathan1 aPonrathnam, S.1 aRajan, C., R.1 aTambe, S., S.  uhttps://library.ncl.res.in/content/photopolymerization-bis-aromatic-and-alicyclic-based-solid-urethane-acrylate-macromonomer-001996nas a2200217   4500008004100000022001400041245012300055210006900178260006900247300001200316490000700328520115900335653003401494653001301528653001701541653002401558100002901582700001901611700001801630856013001648       2014                        eng d  a0300-944000aPhotopolymerization kinetics of bis-aromatic based urethane acrylate macromonomers in the presence of reactive diluent0 aPhotopolymerization kinetics of bisaromatic based urethane acryl  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJAN  a225-2310 v773 a<p>The present work deals with the photopolymerization of bis-aromatic based urethane acrylate macromonomers in the presence of excess end capping agent as reactive diluent and estimation of their kinetic parameters. Formulations were made by independently homogenizing the macromonomers with photoinitiators of three different classes. Three different compositions of photoinitiators were used to study the effect of concentration of photoinitiator on cure kinetics. These compositions obtained were tested for photo curing performance using photo DSC under polychromatic radiation. The heat flows against time were recorded for all formulations under isothermal condition and the rates of polymerization, peak maximum times as well as the percentage conversions were estimated. It was observed that due to a longer timescale for reaction diffusion, formulations with macromonomer containing propoxylated backbone showed higher conversions than the corresponding ethoxylated analogue. The photopolymerization and kinetic estimations of the formulations including evaluation of kinetic model are discussed. (C) 2013 Elsevier B.V. All rights reserved.</p>10aBimolecular termination model10akinetics10aMacromonomer10aPhotopolymerization1 aHarikrishna, Reghunathan1 aPonrathnam, S.1 aRajan, C., R.  uhttps://library.ncl.res.in/content/photopolymerization-kinetics-bis-aromatic-based-urethane-acrylate-macromonomers-presence-001997nas a2200241   4500008004100000022001400041245013000055210006900185260009200254300000800346490000700354520104500361653002001406653003301426653002401459653003001483100002901513700001901542700001901561700001801580700002901598856012801627       2014                        eng d  a1385-772X00aPhotopolymerization of high internal phase emulsions based on 2-ethylhexyl (meth)acrylates and ethylene glycol dimethacrylate0 aPhotopolymerization of high internal phase emulsions based on 2e  a4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLANDbTAYLOR & FRANCIS LTDcJAN  a1-60 v173 a<p>Photopolymerization of high internal phase emulsions based on 2-ethylhexyl (meth)acrylates and ethylene glycol dimethacrylate was carried out in presence of low concentration of different photoinitiators. The stable emulsions obtained by mixing with individual photoinitiators were subjected to low-intensity photopolymerization under UV-Visible lamp. Identical samples were irradiated for differing periods ranging from 2 to 10min at an interval of 2min. The percentage conversions of each monomer in the compositions with respect to the time of irradiation were determined using gas chromatography. It was observed that the formulations containing IRGACURE 819 showed the highest conversion while that containing IRGACURE 2959 showed the least conversion. The former showed high conversion due to the proximity of the absorption maxima of photoinitiator to the major emission line of mercury spectrum at 365nm while the latter showed least conversion due to non-availability of major absorption maxima within the irradiation range.</p>10a(meth)acrylates10ahigh internal phase emulsion10aPhotopolymerization10aresidual monomer analysis1 aHarikrishna, Reghunathan1 aShaikh, A., W.1 aPonrathnam, S.1 aRajan, C., R.1 aBhongale, Sunil, Sitaram  uhttps://library.ncl.res.in/content/photopolymerization-high-internal-phase-emulsions-based-2-ethylhexyl-methacrylates-and-001860nas a2200241   4500008004100000022001400041245008100055210006900136260010200205300001400307490000700321520098000328653001201308653003101320653001201351653003201363653002901395100001701424700001801441700002501459700001901484856011501503       2015                        eng d  a0250-470700aSynthesis and characterization of thermotropic liquid crystalline polyimides0 aSynthesis and characterization of thermotropic liquid crystallin  aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbINDIAN ACAD SCIENCEScOCT  a1553-15590 v383 a<p>Non-symmetrical and linear dyad-based mesogens were synthesised containing imine or ester bridging group. In the present work, due to the absence of branching in diamine-based mesogen, the structure has-rigidity inversely imine/ester bridging groups between two benzene rings imparts-flexible property to the mesogen and consequently rigid-flexible property has been balanced. The synthesised mesogens were characterized by different techniques including nuclear magnetic resonance and Fourier transform infrared spectroscopy. Liquid crystalline polymers (LCPs) were synthesised using pyromellitic dianhydride and 4-[(4-aminobenzylidene)amino]aniline or 4-aminophenyl-4-aminobenzoate. Subsequently, thermotropic liquid crystalline polymers (TLCPs) have also been evaluated to obtain optical microscopy textures at different temperatures which demonstrated interesting and notable changes. It is worth noting that marble-like textures were observed upto 200A degrees C.</p>10aDiamine10aliquid crystalline polymer10amesogen10aoptical microscopy textures10apyromellitic dianhydride1 aMane, Sachin1 aRajan, C., R.1 aPonrathnam, Surendra1 aChavan, Nayaku  uhttps://library.ncl.res.in/content/synthesis-and-characterization-thermotropic-liquid-crystalline-polyimides-101797nas a2200241   4500008004100000022001400041245016500055210006900220260010000289300001200389490000600401520080400407653003201211653002601243653001901269653003001288653002301318100002701341700001801368700001901386700001901405856013101424       2015                        eng d  a1788-618X00aSynthesis of novel silica-polyimide nanocomposite films using aromatic-amino modified silica nanoparticles: mechanical, thermal and morphological investigations0 aSynthesis of novel silicapolyimide nanocomposite films using aro  aDEPT POLYMER ENG, MUEGYETEM RKP 3, BUDAPEST, H-1111, HUNGARYbBUDAPEST UNIV TECHNOL & ECONcMAY  a469-4790 v93 a<p>Silica nanoparticles were modified with aromatic amino groups and modified-silica/polyimide composite films were prepared using them. 3,3!, 4,4!-Benzophenone tetracarboxylic dianhydride (BTDA) and 4,4!-oxydianiline (ODA) were used as precursors for polyimide matrix. The structures of the modified nanoparticles and hybrid nanocomposites were identified using Fourier Transform Infrared (FTIR) spectrometry. The hybrid composite films were evaluated for mechanical, thermal and morphological characteristics. Morphological results describe a uniform dispersion of silica particles in the polymer matrix. The thermal stability and mechanical properties of polyimide composite were improved, and the decomposition temperature was increased when the amount of silica nanoparticles was increased.</p>10ahybrid polyimide composites10amechanical properties10aNanocomposites10ananoparticle modification10aThermal properties1 aGhorpade, Ravindra, V.1 aRajan, C., R.1 aChavan, Nayaku1 aPonrathnam, S.  uhttps://library.ncl.res.in/content/synthesis-novel-silica-polyimide-nanocomposite-films-using-aromatic-amino-modified-silica-002008nas a2200253   4500008004100000022001400041245011100055210006900166260009900235300000900334490000700343520105300350653002801403653002401431653001701455653002701472653002301499100001701522700002501539700001801564700002501582700001901607856012801626       2016                        eng d  a0032-386100aRole of aliphatic hydrocarbon content in non-solvating porogens toward porosity of cross-linked microbeads0 aRole of aliphatic hydrocarbon content in nonsolvating porogens t  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcMAR  a8-140 v863 a<p>Megaporous spherical acrylate copolymer beads were synthesized by suspension polymerization using non-solvating porogens. Non-solvating porogens with higher aliphatic hydrocarbon content generated megaporous morphology with lower surface area. Surface area increased and inversely megaporosity was decreased with decrease in the aliphatic hydrocarbon content of porogen. Megaporosity (5.47 mu m) and pore volume of 5.52 cm(3)/g was obtained with n-decanol. Thermal property of copolymer is a function of type (rigidity/flexibility/elemental composition) and concentration (cross-link density) of monomer and cross-linker. Copolymer containing rigid cross-linker (divinylbenzene) had better thermal stability over copolymer with flexible cross-linker (ethylene dimethacrylate). Further, higher concentration of rigid cross-linker or lower concentration of flexible cross-linker enhanced the thermal stability. Porous polymers are potentially recognized as a solid support for solid-phase synthesis. (C) 2016 Elsevier Ltd. All rights reserved.</p>10aCross-linked microbeads10aInterfacial tension10aMegaporosity10aNon-solvating porogens10aThermal properties1 aMane, Sachin1 aBadiger, Manohar, V.1 aRajan, C., R.1 aPonrathnam, Surendra1 aChavan, Nayaku  uhttps://library.ncl.res.in/content/role-aliphatic-hydrocarbon-content-non-solvating-porogens-toward-porosity-cross-linked-002137nas a2200229   4500008004100000022001400041245015800055210006900213260008700282300001000369490000700379520120700386653003701593653001401630653002901644100002701673700002401700700001801724700001901742700001901761856012701780       2016                        eng d  a0954-008300aSynthesis and characterization of thermally stable polyimides with a pendent phenothiazine unit based on new diamine 10-(3,5-diaminobenzoyl)phenothiazine0 aSynthesis and characterization of thermally stable polyimides wi  a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcFEB  a26-330 v283 a<p>A novel diamine 10-(3,5-diaminobenzoyl)phenothiazine (DBPT) with a side chain containing phenothiazine unit was synthesized. A new family of polyimides (PIs) containing phenothiazine unit in the side chains has been successfully synthesized by direct polycondensation of DBPT with pyromellitic dianhydride, 3,3',4,4'-benzophenone tertacarboxylic dianhydride, and 4,4'-oxydiphthalic anhydride (ODA) via a conventional two-step chemical imidization process. The yield of polymers was good enough, which were soluble in most organic solvents. The molecular orbital energy gaps, thermal stability, and crystallinity of PIs were investigated by molecular modeling, thermogravimetric analysis, and wide-angle X-ray scattering, respectively. Thermal properties of polymers were good enough to permit the use of these PIs in various applications; only 49% weight loss is detected at 900 degrees C in nitrogen atmosphere. X-Ray diffraction clearly reveals the amorphous nature of PIs. A quantum modeling study (density functional theory) has shown the influence of dianhydride structure on the energy difference of highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels.</p>10aphenothiazine-containing diamine10aPolyimide10athermally stable polymer1 aGhorpade, Ravindra, V.1 aThorave, Asmita, K.1 aRajan, C., R.1 aChavan, Nayaku1 aPonrathnam, S.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-thermally-stable-polyimides-pendent-phenothiazine-unit-001888nas a2200241   4500008004100000022001400041245010200055210006900157260000800226300001200234490000700246520108100253653002401334653001301358653002601371653001801397100001801415700002201433700002501455700001801480700002101498856012701519       2020                        eng d  a1380-222400aOne-pot synthesis of bimodal (macro-meso, micro-mesoporous) silica by polyHIPE: parameter studies0 aOnepot synthesis of bimodal macromeso micromesoporous silica by   cFEB  a263-2750 v273 a<p>Porous silica with hierarchical organization of pore structure is desired for a variety of applications such as, chromatography, sensing, control release, scaffold for biomedical applications and catalysis. Highly porous polymers obtained from high internal phase emulsion (HIPE) templating route have attracted increasing attention of researchers due to their hierarchical porous and interconnected structure with high porosity and low density. The novel method adopted in our approach combines redox initiated polymerization using HIPE polymerization and an in-situ sol-gel processing technique followed by calcination to obtain highly porous materials. The obtained materials have reminiscent of polyHIPE morphology containing pores and interconnected pore throats in micrometer size range with mesopores on the wall of macropores. The effect of concentration of TEOS, volume of dispersed phase, crosslinker concentration, shear rate and surfactant concentration as well as variation in calcination temperatures on the properties of silica materials were examined.</p>
10aMesoporous material10aPolyHIPE10aPolymer-silica hybrid10aPorous silica1 aWale, Apparav1 aNalawade, Archana1 aPonrathnam, Surendra1 aRajan, C., R.1 aBadiger, Manohar  uhttps://library.ncl.res.in/content/one-pot-synthesis-bimodal-macro-meso-micro-mesoporous-silica-polyhipe-parameter-studies01764nas a2200253   4500008004100000022001400041245012200055210006900177260000800246300000800254490000700262520090100269653002201170653001501192653003801207653001301245653002201258100001801280700002201298700002301320700001801343700002501361856012401386       2021                        eng d  a1022-976000aConstruction of beta-cyclodextrin linked glycidyl methacrylate polymers for stereoselective separation of chiral drug0 aConstruction of betacyclodextrin linked glycidyl methacrylate po  cAUG  a2870 v283 aIn this present study, a series of cross-linked porous polymers based on Glycidyl Methacrylate (GMA) were synthesized by suspension polymerization using cyclohexanol and hexanol as pore generating solvents. beta-cyclodextrin (beta-CD) was covalently bonded to the polymers by using Hexamethylene Diisocyanate (HMDI) and Sebacoyl Chloride (SC) as spacer arms. The effects of matrix properties such as pore volume, type of crosslinker, and spacer on the loading of beta-cyclodextrin were investigated. The stereoselective binding of enantiomers of the anti-depressant drug citalopram was studied using beta-cyclodextrin loaded polymers under batch adsorption mode. The capacity factor and selectivity of isomers were investigated also. This study reveals that these beta-cyclodextrin bonded Glycidyl Methacrylate (GMA) polymers are potentially suitable for chromatographic separation of citalopram.10abeta-cyclodextrin10aCitalopram10aGlycidyl Methacrylate (GMA) beads10aHPLC etc10aStereoslelctivity1 aWale, Apparav1 aMulani, Khudbudin1 aDeshpande, Supriya1 aRajan, C., R.1 aPonrathnam, Surendra  uhttps://library.ncl.res.in/content/construction-beta-cyclodextrin-linked-glycidyl-methacrylate-polymers-stereoselective