01469nas a2200229   4500008004100000022001400041245009800055210006900153260007700222300001400299490000700313520062400320653004800944653001400992653000901006653001601015653001401031100002301045700002301068700002301091856012501114       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  uhttp://library.ncl.res.in/content/hydrated-clay-catalyst-removal-copper-mediated-atom-transfer-radical-polymerizationa-002141nas a2200205   4500008004100000022001400041245015500055210006900210260006800279300001400347490000700361520130500368653002701673653002101700653001401721100002601735700002301761700002501784856012601809       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  uhttp://library.ncl.res.in/content/synthesis-amphiphilic-polymethyl-methacrylate-b-ethylene-oxide-copolymers-monohydroxy-0