01908nas a2200169   4500008004100000022001400041245010100055210006900156260007100225300001400296490000700310520122200317100002301539700002001562700002601582856013001608       2005                        eng d  a0897-475600aNoncovalent and nonspecific molecular interactions of polymers with multiwalled carbon nanotubes0 aNoncovalent and nonspecific molecular interactions of polymers w  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUN  a3389-33970 v173 a<p>Polymer composites containing variable amounts of multiwalled carbon nanotubes (MWNTs) have been prepared using solution dispersion and melt-shear mixing. Various polymer composites with 1 wt % MWNTs have been found to dissolve homogeneously in organic solvents. The amount of polymer coated or wrapped MWNTs dissolved in the solution was quantified using UV-vis absorbance at 500 nm and the concentration ratio of [MWNTs](solution)/[MWNTs](composite) was close to 1. A nonspecific polymer adsorption through multiple-weak molecular interactions of CH groups with MWNTs in the composites has been identified through FTIR spectroscopy. The composites of polybutadiene with different wt % of MWNTs showed slight changes in the CH bending vibrations, indicating the presence of intermolecular CH-pi interactions. The dissolution of various polymer composites containing low concentration of MWNTs in organic solvents was attributed to polymer coating on the MWNTs via noncovalent and nonspecific CH-pi interactions. The dissolution of MWNTs in organic solvents using common polymers used in this study indicates that the coating or wrapping is a general phenomenon occurring between polymers and carbon nanotubes.</p>1 aBaskaran, Durairaj1 aMays, Jimmy, W.1 aBratcher, Matthew, S.  uhttps://library.ncl.res.in/content/noncovalent-and-nonspecific-molecular-interactions-polymers-multiwalled-carbon-nanotubes-101359nas a2200229   4500008004100000022001400041245006500055210006300120260010600183300001200289490000700301520057700308653002700885653001500912653001200927653001400939653001300953653001500966100002300981700002501004856010001029       2007                        eng d  a0079-670000aAnionic vinyl polymerization - 50 years after Michael Szwarc0 aAnionic vinyl polymerization 50 years after Michael Szwarc  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcFEB  a173-2190 v323 a<p>We present a review on the present status of anionic polymerization of important non-polar and polar vinyl monomers. After presenting the historical background-the ``pre-Szwarc'' era-we discuss the mechanisms of this polymerization, in particular several types of carbanions, their ion-pairs and their aggregates occurring in the initiation and propagation of non-polar and polar monomers, including recent developments. Finally, we discuss some important scientific and industrial applications of anionic polymerization. (c) 2007 Elsevier Ltd. All rights reserved.</p>10aAnionic polymerization10acarbanions10ahistory10aion-pairs10akinetics10amechanisms1 aBaskaran, Durairaj1 aMueller, Axel, H. E.  uhttps://library.ncl.res.in/content/anionic-vinyl-polymerization-50-years-after-michael-szwarc-100762nas a2200181   4500008004100000022001400041245012100055210006900176260007100245300001400316490000700330100002600337700001600363700002000379700002700399700002300426856013100449       2007                        eng d  a0897-475600aControlled covalent functionalization of multiwalled carbon nanotubes using [4+2] cycloaddition of benzocyclobutenes0 aControlled covalent functionalization of multiwalled carbon nano  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC  a6370-63720 v191 aSakellariou, Georgios1 aJi, Haining1 aMays, Jimmy, W.1 aHadjichristidis, Nikos1 aBaskaran, Durairaj  uhttps://library.ncl.res.in/content/controlled-covalent-functionalization-multiwalled-carbon-nanotubes-using-42-cycloaddition-001871nas a2200229   4500008004100000022001400041245008000055210006900135260009500204300001400299490000600313520101500319653002701334653003101361653001301392653003401405100002301439700002601462700002001488700002601508856010701534       2007                        eng d  a1533-488000aGrafting reactions of living macroanions with multi-walled carbon nanotubes0 aGrafting reactions of living macroanions with multiwalled carbon  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScAPR  a1560-15670 v73 a<p>Grafting reactions of living polystyryllithium (PSLi) with acid chloride containing multi-walled carbon nanotubes (MWNTs-COCl) were performed under vacuum in benzene at room temperature. Covalent grafting of polystyrene (PS) was characterized using spectroscopic, microscopic, and thermogravimetric analyses. Grafting at different ratios of macroanion to acylchloride of the carbon nanotubes showed that the grafting efficiency was not dependent on the concentration of the macroanions. The mole percent of PS present in the MWNTs-g-PS samples was inversely proportional to the precursor molecular weight of PSLi. Direct reactions of PSLi, polybutadienyllithium and n-butyllithium with pristine MWNTs without any functional groups were also performed in the presence and in the absence of tetrahydrofuran in benzene. The grafting reactions of living macroanions either with MWNTs-COCl or with pristine MWNTs indicated a partial grafting of polymer on the carbon nanotubes in benzene at room temperature.</p>10aAnionic polymerization10acovalent functionalization10agrafting10amulti-walled carbon nanotubes1 aBaskaran, Durairaj1 aSakellariou, Georgios1 aMays, Jimmy, W.1 aBratcher, Matthew, S.  uhttps://library.ncl.res.in/content/grafting-reactions-living-macroanions-multi-walled-carbon-nanotubes01470nas a2200229   4500008004100000022001400041245009800055210006900153260007700222300001400299490000700313520062400320653004800944653001400992653000901006653001601015653001401031100002301045700002301068700002301091856012601114       2008                        eng d  a1022-133600aHydrated clay for catalyst removal in copper mediated atom transfer radical polymerization(a)0 aHydrated clay for catalyst removal in copper mediated atom trans  aPO BOX 10 11 61, D-69451 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcSEP  a1538-15430 v293 a<p>A simple method has been described to remove catalyst from the copper mediated atom transfer radical polymerization (ATRP) of benzyl methacrylate and methyl methacrylate in anisole at 25 degrees C using hydrated natural clay (sodium montmorillonite, Na-clay). The method consists of (1) addition of hydrated clay (CU(I/)clay approximate to 5 wt.-%) either during or after the polymerization, (2) oxidation of catalyst complex by exposing the terminated reaction mixture in air, and (3) filtration to obtain catalyst free polymer solution. A strong coordination of CuBr-ligand complex onto hydrated clay (10 wt.-%</p>10aAtom transfer radical polymerization (ATRP)10aCatalysts10aclay10aselectivity10asynthesis1 aMunirasu, Selvaraj1 aDeshpande, Ashwini1 aBaskaran, Durairaj  uhttps://library.ncl.res.in/content/hydrated-clay-catalyst-removal-copper-mediated-atom-transfer-radical-polymerizationa-002142nas a2200205   4500008004100000022001400041245015500055210006900210260006800279300001400347490000700361520130500368653002701673653002101700653001401721100002601735700002301761700002501784856012701809       2008                        eng d  a0887-624X00aSynthesis of amphiphilic poly(methyl methacrylate-b-ethylene oxide) copolymers from monohydroxy telechelic poly(methyl methacrylate) as macroinitiator0 aSynthesis of amphiphilic polymethyl methacrylatebethylene oxide   a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAR  a2132-21440 v463 a<p>The synthesis of well-defined poly(methyl methacrylate)-block-poly(ethylene oxide) (PMMA-b-PEO) dibock copolymer through anionic polymerization using monohydroxy telechelic PMMA as macroinitiator is described. Living anionic polymerization of methyl methacrylate was performed using initiators derived from the adduct of diphenylethylene and a suitable alkyllithium, either of which contains a hydroxyl group protected with tert-butyldimethylsilyl moiety in tetrahydrofuran (THF) at -78 degrees C in the presence of LiClO4. The synthesized telechelic PMMAs had good control of molecular weight with narrow molecular weight distribution (MWD). The H-1 NMR and MALDI-TOF MS analysis confirmed quantitative functionalization of chain-ends. Block copolymerization of ethylene oxide was carried out using the terminal hydroxyl group of PMMA as initiator in the presence of potassium counter ion in THF at 35 degrees C. The PMMA-b-PEO diblock copolymers had moderate control of molecular weight with narrow MWD. The H-1 NMR results confirm the absence of trans-esterification reaction of propagating PEO anions onto the ester pendants of PMMA. The micellation behavior of PMMA-b-PEO diblock copolymer was examined in water using H-1 NMR and dynamic light scattering. (C) 2008 Wiley Periodicals, Inc.</p>10aAnionic polymerization10ablock copolymers10asynthesis1 aDhara, Mahua, Ganguly1 aBaskaran, Durairaj1 aSivaram, Swaminathan  uhttps://library.ncl.res.in/content/synthesis-amphiphilic-polymethyl-methacrylate-b-ethylene-oxide-copolymers-monohydroxy-000979nas a2200157   4500008004100000022001400041245011400055210006900169260011000238300001400348520026200362100002300624700001900647700002300666856013200689       2009                        eng d  a1359-734500aHighly efficient recyclable hydrated-clay supported catalytic system for atom transfer radical polymerization0 aHighly efficient recyclable hydratedclay supported catalytic sys  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUN  a4518-45203 a<p>Atom transfer radical polymerization of methacrylates has been performed using hydrated natural clay as a support for a CuBr(2)-ligand complex and the supported clay catalyst has been recycled for 21 batch polymerizations without losing its activity.</p>1 aMunirasu, Selvaraj1 aAggarwal, Ravi1 aBaskaran, Durairaj  uhttps://library.ncl.res.in/content/highly-efficient-recyclable-hydrated-clay-supported-catalytic-system-atom-transfer-radical-001718nas a2200205   4500008004100000022001400041245008500055210006900140260005700209300001200266490000700278520096900285653002701254653001801281653002301299100002601322700002501348700002301373856011601396       2009                        eng d  a0170-083900aSynthesis of hydroxy-functionalized star-branched PMMA by anionic polymerization0 aSynthesis of hydroxyfunctionalized starbranched PMMA by anionic   a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcAUG  a185-1960 v633 a<p>Living anionic polymerization has been exploited to synthesize hydroxy end-functionalized PMMA star-branched polymers. Protected hydroxy-functionalized alkyl lithium initiators have been used to initiate anionic polymerization of MMA. Subsequently the living chains with protected hydroxyl function have been used to cross-link ethylene glycol dimethacrylate (EGDMA) in order to form star-branched polymers with cross-linked EGDMA core via `arm-first' method. The linear arms and the star molecules have been characterized by (1)HNMR, GPC, and light scattering. Variation in the number of arms with arm molecular weight and cross-linker loading has been studied. Star-branched PMMA-OH with as many as similar to 10 arms could be successfully made. Increased molecular weight of PMMA-OH led to decrease in the number of arms incorporated due to increased steric hindrance on the core. Increase in EGDMA concentration slightly increased the arm incorporation.</p>10aAnionic polymerization10aStar polymers10aStar-branched PMMA1 aDhara, Mahua, Ganguly1 aSivaram, Swaminathan1 aBaskaran, Durairaj  uhttps://library.ncl.res.in/content/synthesis-hydroxy-functionalized-star-branched-pmma-anionic-polymerization-0