Synthesis of hydroxy-functionalized star-branched PMMA by anionic polymerization

TitleSynthesis of hydroxy-functionalized star-branched PMMA by anionic polymerization
Publication TypeJournal Article
Year of Publication2009
AuthorsDhara, MGanguly, Sivaram, S, Baskaran, D
JournalPolymer Bulletin
Volume63
Issue2
Pagination185-196
Date PublishedAUG
ISSN0170-0839
KeywordsAnionic polymerization, Star polymers, Star-branched PMMA
Abstract

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.

DOI10.1007/s00289-009-0082-7
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)1.215
Divison category: 
Polymer Science & Engineering