摘要
控制单体配比 ,采用丙烯腈 (AN)与丙烯酸 (AA)自由基溶液共聚 ,以偶氮二异丁腈为引发剂在溶剂二甲基亚砜中合成了聚丙烯腈原丝纺丝溶液 ,并纺制了碳纤维前驱体聚丙烯腈原丝。通过 IR、DSC、DTG等手段 ,讨论了共聚单体 AA对共聚反应及聚丙烯腈原丝结构和热性能的影响。共聚单体 AA能在较低温度时引发聚丙烯腈原丝的氧化、环化放热反应 ,且能减缓放热效应。P(AN- co- AA)共聚物中共聚单体 AA的摩尔分数控制在 m2 =0 .0 2 5较合适。
Free radical solution copolymerization of acrylic acid(AA) and acrylonitrile(AN) was carried out in DMSO at 60 ℃ using azodiisobutyronitrile(AIBN) as initiator. The PAN precursors of carbon fibers were spun. These were characterized by IR, DSC, DTG and so on. Then the effect of different mole fraction of acrylic acid in the copolymer on the structure and thermal properties of PAN precursors was introduced. It is adequate to control the mole fraction of AA in the P(AN co AA) copolymers with m 2=0.025. Furthermore, in the case of P(AN co AA) copolymers, the cycslization starts at a lower temperature and propagates at a slower rate.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2000年第4期76-78,共3页
Polymer Materials Science & Engineering
基金
山东省十大高新技术项目
国家自然科学基金!( 5 9783 0 0 2 )
山东省科委资助项目
关键词
聚丙烯腈
原丝
丙烯酸
结构
性能
碳纤维
PAN precursor
acrylic acid
acrylonitrile
structure and property
carbon fiber
