Synthesis and properties of bromide‐ functionalized poly(isobutylene‐co‐p‐ methylstyrene) random copolymer. Issue 3 (7th December 2016)

• Record Type: Journal Article
• Authors: Xie, Yi; Chang, Jin‐jie; Wu, Yi‐bo; Yang, Dan; Wang, Hao; Zhang, Tao; Li, Shu‐xin; Guo, Wen‐li
• Is Part Of: Polymer international. Volume 66:Issue 3(2017:Mar.)
• Page Start: 468
• Page End: 476
• Publication Date: 2016-12-07
• Subjects: cationic polymerization -- isobutylene -- random copolymer -- bromination; Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.7
• DOI: 10.1002/pi.5286
• Languages: English
• ISSNs: 0959-8103

Abstract

Abstract: 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 Synthesis and properties of bromide‐functionalized poly (isobutylene‐ co‐p ‐methylstyrene) random copolymer: Uniform IB/ p ‐MS random copolymers were successfully synthesized via a cationic copolymerization at elevated temperatures. The types and selection of appropriate vulcanization systems for bromide‐functionalized IB/ p ‐MS random copolymers are discussed.