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Synthesis and properties of bromide‐ functionalized poly(isobutylene‐ co‐p ‐ methylstyrene) random copolymer
Author(s) -
Xie Yi,
Chang Jinjie,
Wu Yibo,
Yang Dan,
Wang Hao,
Zhang Tao,
Li Shuxin,
Guo Wenli
Publication year - 2017
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5286
Subject(s) - copolymer , isobutylene , comonomer , polymer chemistry , cationic polymerization , bromide , vulcanization , materials science , bromine , polymer , chemistry , organic chemistry , natural rubber
Poly(isobutylene‐ co‐p ‐methylstyrene) ( IB / p ‐ MS ) random copolymer is a new generation of polyisobutylene‐based elastomers. The cationic copolymerization of IB with p ‐ MS was thoroughly examined by using 2‐chloro‐2,4,4‐trimethylpentane/ethylaluminiumsesquichloride/electron donor as initiating system. IB / p ‐ MS random copolymers with high molecular weight were obtained at elevated temperature through the addition of ethyl acetate; the reaction proceeded in a mildly exothermic manner. Although the reactivity ratios of comonomer pairs differ by close to an order of magnitude, p ‐ MS was uniformly distributed in the chains. IB / p ‐ MS random copolymer can be brominated by adding molecular bromine into the copolymer solution, thereby yielding a completely saturated polymer backbone with a chemically reactive site. The types and selection of appropriate vulcanization systems for bromide‐functionalized IB / p ‐ MS random copolymers are also discussed. © 2016 Society of Chemical Industry