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The suitable itaconic acid content in polyacrylonitrile copolymers used for PAN‐based carbon fibers
Author(s) -
Fu Zhongyu,
Liu Baijun,
Deng Yunjiao,
Ma Jianying,
Cao Chunlei,
Wang Jing,
Ao Yuhui,
Zhang Huixuan
Publication year - 2016
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.43919
Subject(s) - itaconic acid , polyacrylonitrile , copolymer , acrylonitrile , polymer chemistry , nitrile , polymerization , materials science , carbonization , carbon fibers , polymer , chemistry , organic chemistry , composite material , scanning electron microscope , composite number
ABSTRACT This article was to provide some new insights into the influences of itaconic acid (IA) content in polyacrylonitrile (PAN) copolymers on polymerization, structural evolution, thermal behaviors and carbon yield relatively comprehensively. High IA containing poly(acrylonitrile‐ co ‐itaconic acid) (PAI) oligomers were successfully extracted from PAI copolymers with 2.0 and 3.0 mol % IA. PAI copolymers with 0.5 mol % and 1.0 mol % IA possessed more cyclized structures, conjugated carbonyl group, conjugated nitrile group, and less β‐amino nitrile group as well as faster structural evolution rate than those of the other three PAI copolymers. Kinetic parameters indicated that excessive IA content in PAI copolymer did not have advantages in promoting cyclization reaction. The PAI copolymers with 0.5 wt % to 1.0 mol % IA possessed better crystalline parameters as well as higher carbon yield than those of the other two PAI copolymers after carbonization at 1350 ºC. In summary, PAI copolymers with 0.5 mol % to 1.0 mol % IA will be more suitable for fabricating of high performance PAN‐based carbon fibers. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43919.