02142nas 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-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