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Some monomer reactivity ratios of styrene and (meth)acrylates in the presence of TEMPO
Author(s) -
Jianying Huang,
Jiayan Chu,
Jiaming Zhuang,
Yihong Chen,
Lizong Dai,
Yousi Zou
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.22512
Subject(s) - copolymer , monomer , polymer chemistry , reactivity (psychology) , methacrylate , acrylate , methyl methacrylate , styrene , methyl acrylate , gel permeation chromatography , vinyl acetate , chemistry , polymerization , dispersity , ethyl acrylate , materials science , organic chemistry , polymer , medicine , alternative medicine , pathology
The living free‐radical copolymerizations of styrene (St) with the polar monomers (methyl methacrylate (MMA), ethyl methacrylate (EMA), butyl methacrylate (BMA), methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), 2‐hydroxyethyl acrylate (HEA), and vinyl acetate (VAc)) mediated by TEMPO and BPO as initiator at 125°C had been analyzed by 1 H NMR and gel permeation chromatography (GPC). The data from GPC showed that the polydispersities of the resulted copolymers were below 1.5, and the rate of polymerization increased, while the polydispersity declined with increase in St molar fraction in the feed. Monomer reactivity ratios had been determined by expanded Kelen–Tüdos method. r St = 1.32, r MA = 0.14; r St = 1.17, r EA = 0.23; r St = 0.83, r BA = 0.20; r St = 0.74, r MMA = 0.25; r St = 0.76, r EMA = 0.30; r St = 1.27, r BMA = 0.59; r St = 1.67, r VAc = 1.05; and r St = 0.28, r HEA = 0.43. In the copolymerization of St with acrylates the monomer reactivity ratio r 1 (St) decreases and in the copolymerization of St with methacrylates the monomer reactivity ratio r 1 (St) increases while the length of the substituted group increases. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3531–3535, 2006