01727nas a2200181   4500008004100000022001400041245008800055210006900143260008400212300001400296490000700310520100500317100002901322700003101351700002401382700001801406856012101424       2007                        eng d  a0009-267300aCholesterol-linked beta-cyclodextrin - a thermotropic liquid-crystalline derivative0 aCholesterollinked betacyclodextrin a thermotropic liquidcrystall  a1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPANbCHEMICAL SOC JAPANcOCT  a1975-19800 v803 a<p>Liquid-crystalline derivative of ss-cyclodextrin (BCD) was prepared by covalent linking of monocholesteryl succinate (ChMS) with ss-cyclodextrin. To the best of our knowledge, this was first ever attempt so far of its kind, in which BCD has been converted into its liquid-crystalline derivative through covalent linkage of a mesogen. The degree of substitution (DS) obtained was approximate to 2.00. The product was characterized by various techniques, such as FT-IR, NMR, DSC, hot-stage-coupled optical polarizing microscopy (OPM), microanalysis and chemical methods. Cholesterol-linked ss-cyclodextrin (CDCh) derivative was found to exhibit thermotropic liquid-crystalline behavior. The product exhibited birefringence during first heating above 130 degrees C, and it became isotropic at about 180 degrees C, whereas the parent compound BCD decomposed without melting above 250 degrees C. A comparison of CDCh derivative to similar liquid-crystalline polysaccharide derivatives is presented.</p>1 aShaikh, Vasi, Ahmed Ebra1 aLonikar, Shrikant, Vitthal1 aDhoble, Deepa, Arun1 aPawar, G., M.  uhttps://library.ncl.res.in/content/cholesterol-linked-beta-cyclodextrin-thermotropic-liquid-crystalline-derivative-001744nas a2200241   4500008004100000022001400041245014400055210006900199260006800268300001400336490000800350520082900358653001401187653002201201653001401223653003301237100002401270700002001294700002101314700002401335700002001359856012301379       2007                        eng d  a0021-899500aControlled synthesis of low-molecular-weight polyethylene waxes by titanium-biphenolate-ethylaluminum sesquichloride based catalyst systems0 aControlled synthesis of lowmolecularweight polyethylene waxes by  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAY  a1531-15390 v1043 a<p>Soluble complexes of titanium(IV) bearing sterically hindered biphenols, such as biphenol, 1,1'-methylene di-2-naphthol, 2,2'-methylene bis(4-chlorophenol), 2,2'-methylene bis(6-tert-butyl-4-ethyl phenol), and 2,2' ethylidene bis(4,6-di-tert-butyl phenol), were prepared and characterized. These catalyst precursors, formulated as [Ti((OO)-O-boolean AND)X-2], were active in the polymerization of ethylene at high temperatures in combination with ethylaluminum sesquichloride as a cocatalyst. The ultra-low-molecular-weight polyethylenes (PEs) were linear and crystalline and displayed narrow polydispersities. The catalytic polymerization leading to PE waxes in this reaction exhibited unique properties that have potential applications in surface coatings and adhesive formulations. (c) 2007 Wiley Periodicals, Inc.</p>10aCatalysts10apolyethylene (PE)10asynthesis10aZiegler-Natta polymerization1 aUmare, Prashant, S.1 aRao, Karumanchi1 aTembe, Gopal, L.1 aDhoble, Deepa, Arun1 aTrivedi, Bhavna  uhttps://library.ncl.res.in/content/controlled-synthesis-low-molecular-weight-polyethylene-waxes-titanium-biphenolate-101002nas a2200229   4500008004100000022001400041245006300055210006100118260009500179300001200274490000700286520022700293653001100520653001800531653001800549100002400567700002000591700002100611700002400632700002000656856009600676       2007                        eng d  a0021-979700aPolyethylene waxes: catalytic synthesis by ti-biphenolates0 aPolyethylene waxes catalytic synthesis by tibiphenolates  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJUL  a977-9870 v443 a<p>{Soluble complexes of Ti (IV) bearing biphenol groups such as 1,1'-binaphthelene 2, 2' diol (Binol), 1, 1'-methylene di-2-naphthol, biphenol were prepared and characterized. These catalyst precursors formulated as [</p>10afibers10aNanoparticles10aSelf-assembly1 aUmare, Prashant, S.1 aRao, Karumanchi1 aTembe, Gopal, L.1 aDhoble, Deepa, Arun1 aTrivedi, Bhavna  uhttps://library.ncl.res.in/content/polyethylene-waxes-catalytic-synthesis-ti-biphenolates-002037nas a2200349   4500008004100000245004900041210004900090260000800139520084500147100002000992700003101012700003101043700003101074700002801105700003301133700002501166700004301191700003001234700002901264700002701293700002901320700003001349700003401379700003001413700001901443700003101462700002401493700002501517700003001542700003101572856008401603       2010                        eng d00aAmino functionalized oligoimides telechelics0 aAmino functionalized oligoimides telechelics  cAUG3 a<p>This invention relates to a process for the preparation of amino functionalized oligoimide telechelics. More particularly it relates to a process for the preparation of soluble oligoimide prepolymers which can be used as matrix resins that can be rapidly cured to form stable polyimides with amino end functionalities. The amino functionalized oligoimide telechelics are suitable for conversion into three dimensional polymeric systems through condensation chemistry such as reaction with oligo epoxies (epoxy-imide resins), polyacids (polyamide imides) and polyhalogenated compounds (poly amine - imides) to form crosslinked structures having enhanced thermal stability and mechanical strength. The polymers prepared by the process of this invention can be used as materials in advanced composites having high temperature stability.</p>1 aDwivedi, Mayank1 aRao, Locanindi, Hari Sarvo1 aReddy, Krishna, Mohan Srin1 aDhanasekharan, Janakiraman1 aRao, Bevara, Madhusudan1 aKumar, Sriperambudur, Rajesh1 aPonrathnam, Surendra1 aRajan, Chelanattukizhakkemadath, Raman1 aDeokar, Sarika, Babasaheb1 aMulani, Khudbudin, Baban1 aGhorpade, Ravindra, V.1 aBhongale, Sunil, Sitaram1 aNalawade, Archana, Chetan1 aSontakke, Kalpana, Vishwanath1 aShaikh, Wasif, Abdul Late1 aChavan, Nayaku1 aQureshi, Mohammed, Shadbar1 aDhoble, Deepa, Arun1 aMule, Smita, Atmaram1 aBhosle, Sonali, Madhavrao1 aMomin, Mohasin, Shamshuddi  uhttps://library.ncl.res.in/content/amino-functionalized-oligoimides-telechelics01894nas a2200397   4500008004100000245007400041210006900115260000800184520048600192100002000678700003100698700003500729700003100764700002800795700003300823700002500856700004300881700002400924700003100948700001900979700003000998700002901028700002701057700002901084700003001113700003401143700003001177700002501207700002401232700001901256700003001275700002901305700002701334700003101361856010401392       2012                        eng d00aAmino functionalized oligo polyimides with enhanced storage stability0 aAmino functionalized oligo polyimides with enhanced storage stab  cJUL3 a<p>The invention relates to an improved process for the preparation of amino functionalized oligomeric monomeric reactant type polyimides having higher stability. More particularly it relates to a process for the preparation of soluble imide prepolymers, used as matrix resins that can be rapidly cured with multi-functional moieties such as diepoxy, dicarboxyl, anhydride, diisocyanates to form crosslinked structures having enhanced thermal stability and mechanical strength.</p>1 aDwivedi, Mayank1 aRao, Locanindi, Hari Sarvo1 aMohan, Srinivasulu, Reddy Kris1 aDhanasekharan, Janakiraman1 aRao, Bevara, Madhusudan1 aKumar, Sriperambudur, Rajesh1 aPonrathnam, Surendra1 aRajan, Chelanattukizhakkemadath, Raman1 aTayal, Rajiv, Kumar1 aShadbar, Qureshi, Mohammed1 aChavan, Nayaku1 aDeokar, Sarika, Babasaheb1 aMulani, Khudbudin, Baban1 aGhorpade, Ravindra, V.1 aBhongale, Sunil, Sitaram1 aNalawade, Archana, Chetan1 aSontakke, Kalpana, Vishwanath1 aBhosle, Sonali, Madhavrao1 aMule, Smita, Atmaram1 aDhoble, Deepa, Arun1 aJohn, Aruldoss1 aShaikh, Wasif, Abdul Late1 aHarikrishna, Reghunathan1 aPunitharasu, Vellimala1 aMomin, Mohasin, Shamshuddi  uhttps://library.ncl.res.in/content/amino-functionalized-oligo-polyimides-enhanced-storage-stability01876nas a2200397   4500008004100000245007700041210006900118260000800187520046300195100002900658700002900687700003000716700001900746700004300765700003000808700002400838700002000862700002700882700002900909700003100938700001900969700003200988700003101020700002901051700002501080700003001105700002801135700003101163700002401194700003001218700003401248700003101282700003301313700002501346856010701371       2012                        eng d00aEthyl oligo-silicates with strong acid heterogeneous polymeric catalysts0 aEthyl oligosilicates with strong acid heterogeneous polymeric ca  cMAY3 a<p>The present invention provides a process for the synthesis of ethyl silicate with varying silica concentration, by hydrolysing ethyl silicate in varying water concentration in the presence of sulfonated catalysts having a styrene-divinyl benzene backbone. The present invention further relates to the preparation of beaded crosslinked polymers containing sulfonic acid moieties having an interconnected pore structure and surface area up to 400 m2 /g.</p>1 aBevara, Madhusudana, Rao1 aBhongale, Sunil, Sitaram1 aBhosle, Sonali, Madhavrao1 aChavan, Nayaku1 aChelanattukizhakkemadath, Raman, Rajan1 aDeokar, Sarika, Babasaheb1 aDhoble, Deepa, Arun1 aDwivedi, Mayank1 aGhorpade, Ravindra, V.1 aHarikrishna, Reghunathan1 aDhanasekharan, Janakiraman1 aJohn, Aruldoss1 aLocanindi, Hari, Sarvothama1 aMomin, Mohasin, Shamshuddi1 aMulani, Khudbudin, Baban1 aMule, Smita, Atmaram1 aNalawade, Archana, Chetan1 aPunitharasu, Vellimalai1 aQureshi, Mohammed, Shadbar1 aKumar, Tayal, Rajiv1 aShaikh, Wasif, Abdul Late1 aSontakke, Kalpana, Vishwanath1 aReddy, Krishna, Mohan Srin1 aSriperambudur, Rajesh, Kumar1 aPonrathnam, Surendra  uhttps://library.ncl.res.in/content/ethyl-oligo-silicates-strong-acid-heterogeneous-polymeric-catalysts02412nas a2200265   4500008004100000022001400041245008700055210006900142260006700211300001400278490000700292520149600299100002501795700002401820700002301844700002401867700001501891700001901906700001901925700001801944700002301962700002001985700002102005856012002026       2015                        eng d  a0032-388800aLong chain branched impact copolymer of polypropylene: microstructure and rheology0 aLong chain branched impact copolymer of polypropylene microstruc  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcJUL  a1463-14740 v553 a<p>A biphasic impact copolymer of polypropylene (ICP) was modified with peroxide by reactive extrusion process resulting in reduced melt flow index, improved melt strength, and higher die swell. The polymers were for the first time subjected to systematic rheological and microstructural characterization in an effort to understand their structure-property relations. In shear rheological tests, the modified ICP displayed higher flow activation energy, reduced values of loss tangent and nearly equal frequency dependence of storage and loss modulli. The modified ICP also showed strain hardening behaviour in uniaxial extensional rheology and higher crystallization temperature in differential scanning calorimetry (DSC). All these are definitive indications of the presence of long chain branches (LCB). Fitting the rheological data of modified ICPs with the eXtended Pom Pom (XPP) model indicated the presence of LCB on the higher molecular weight fraction in the polymer, a result which was corroborated with multi-detector high temperature gel permeation chromatography (HT-GPC). More importantly, the matrix and rubber phases of the ICP were separately characterized for presence of long chain branching by rheology, DSC and HT-GPC. The results indicate that while LCB existed in the matrix phase, microgels were present in both phases indicating that the reaction with peroxide occurred in both phases. POLYM. ENG. SCI., 55:1463-1474, 2015. (c) 2014 Society of Plastics Engineers</p>1 aChikhalikar, Kalyani1 aDeshpande, Anushree1 aPol, Harshawardhan1 aDhoble, Deepa, Arun1 aJha, Saroj1 aJadhav, Kishor1 aMahajan, Sunil1 aAhmad, Zubair1 aKulkarni, Surendra1 aGupta, Surendra1 aLele, Ashish, K.  uhttps://library.ncl.res.in/content/long-chain-branched-impact-copolymer-polypropylene-microstructure-and-rheology-003093nas a2200301   4500008004100000022001400041245012800055210006900183260009900252300001200351490000800363520198800371653002802359653001302387653002002400653001502420653003402435100002002469700002202489700002302511700002002534700002402554700002002578700002202598700001802620700002302638856013002661       2016                        eng d  a0144-861700aProton play in the formation of low molecular weight chitosan (LWCS) by hydrolyzing chitosan with a carbon based solid acid0 aProton play in the formation of low molecular weight chitosan LW  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcOCT  a417-4250 v1513 a<p>Low molecular weight chitosan (LWCS) constitute a special class of value added chemicals that are primarily obtained from crustacean shells, which are the main water pollutants from crabs and shrimp processing centers. Unlike chitin and chitosan, LWCS possess improved solubility in water and aqueous solutions, making them widely applicable in numerous fields ranging from drug delivery to waste water treatment. Among the methods employed for their production, chemical breakdown by strong liquid acids has yielded good success. However, this method is met with severe concerns arising from the harsh nature of liquid acids, which may corrode the reactors for commercial synthesis, and their limited reusability. The physical methods like ultrasound and microwave are energy intensive in nature, while the enzymatic methods are expensive and offers limited scope for reuse. We have attempted to overcome these problems by employing carbon based solid acid (CSA) for hydrolyzing chitosan to LWCS. CSA can be easily produced using activated carbon, a cost-effective and easily available raw material. Reactions were carried out between chitosan and CSA in a hydrothermal glass reactor and the products, separated by cold centrifugation, were purified and dried. The dried products were characterized for their molecular weight and solubility. Results indicated more than ten-fold decrease in the molecular weight of chitosan and the product exhibited water solubility. The CSA could be used upto four times, without regeneration, to give a consistent quality product. The aqueous solution of resulting LWCS exhibited a pH of 6.03 +/- 0.11, as against the acidic pH range of solutions of commercially available LWCS, indicating its suitability for biomedical applications. Our investigation facilitates a `green approach' that may be employed for commercial production of value added chemicals from waste products of marine industry. (C) 2016 Elsevier Ltd. All rights reserved.</p>10aCarbon based solid acid10aChitosan10agreen synthesis10aHydrolysis10aLow molecular weight chitosan1 aKrishnan, Akhil1 aDeshmukh, Pranjal1 aAgarwal, Siddharth1 aPurohit, Poorvi1 aDhoble, Deepa, Arun1 aWaske, Prashant1 aKhandekar, Dileep1 aJain, Ratnesh1 aDandekar, Prajakta  uhttps://library.ncl.res.in/content/proton-play-formation-low-molecular-weight-chitosan-lwcs-hydrolyzing-chitosan-carbon-based