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Extremely High Glass Transition Temperature Hydrocarbon Polymers Prepared through Cationic Cyclization of Highly 3,4‐Regulated Poly(Phenyl‐1,3‐Butadiene)
Author(s) -
Cai Yang,
Lu Jianmin,
Zuo Danlin,
Li Shihui,
Cui Dongmei,
Han Bingyong,
Yang Wantai
Publication year - 2018
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800298
Subject(s) - cationic polymerization , prepolymer , substituent , glass transition , polymer , polymer chemistry , hydrocarbon , materials science , chemistry , organic chemistry , polyurethane
A simple approach to synthesize extremely high glass transition temperature (Tg > 300 °C) hydrocarbon polymers that introduces bridged cyclic backbone and bulky pendant group simultaneously is reported. This method uses highly 3,4‐regulated poly(phenyl‐1,3‐butadiene) as a prepolymer for cationic cyclization postmodification. The Tg of cyclized highly 3,4‐regulated (94.0%) poly(1‐phenyl‐1,3‐butadiene) (P(1‐PB)) can reach 304 °C. To further restrict the movement of bridged cyclic backbone by changing the position of the pendant substituent group, highly 3,4‐regulated (96.2%) poly(2‐phenyl‐1,3‐butadiene) (P(2‐PB)) is used as the prepolymer. The Tg of its cyclized product reaches 325 °C, and this value is the highest ever reported among all hydrocarbon polymers. The results indicate that the regularity of poly(phenyl‐1,3‐butadiene) and the pendant substituent group are crucial factors when synthesizing high‐temperature hydrocarbon polymers through this approach.