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Chain transfer and living functionalization of polymethacrylates by group transfer polymerization using ethyl 2‐Phenyl‐2‐butenoate
Author(s) -
Quirk Roderic P.,
Ren Jie
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940880104
Subject(s) - chain transfer , polymer chemistry , alkyl , copolymer , surface modification , methyl methacrylate , living polymerization , polymerization , monomer , chemistry , catalytic chain transfer , anionic addition polymerization , stoichiometry , trimethylsilyl , ketene , end group , radical polymerization , organic chemistry , polymer
Abstract A living functionalization method has been investigated for group transfer polymerization (GTP) of poly(alkyl methacrylates) using ethyl 2‐phenyl‐2‐butenoate (EPB). The end‐capping reactions of EPB to living trimethylsilyl ketene acetal‐ended poly(methyl methacrylate) (PMMA) chain ends have been systematically studied and characterized by SEC, VPO, UV‐visible spectrosocopy, 1 H and 13 c NMR spectroscopy. The results of sequential monomer addition, varying stoichiometry and copolymerization indicate that EPB effects efficient chain end functionalization only at stoichiometric concentrations; chain transfer reactions (chain transfer constant = 0.4) occur with excess EPB and during copolymerization with MMA. Chain transfer reactions (chain transfer constant = 0.1) also occur when copolymerizing ethyl 2‐methyl‐2‐butenoate with MMA.