衣康酸含量对聚丙烯腈环化反应动力学的影响  

Effect of Itaconic Acid Content on the Kinetics of Cyclization Reaction of Polyacrylonitrile

作　　者：张丽春[1] 张会轩[1,2] 曹春雷[1] 邓云娇[1] 马剑英[1] 

机构地区：[1]长春工业大学教育部合成树脂与特种纤维研究中心,吉林长春130012 [2]中国科学院长春应用化学研究所,吉林长春130022

出　　处：《塑料工业》2014年第12期17-20,共4页China Plastics Industry

基　　金：国家自然科学基金项目(51273026)

摘　　要：采用溶液共聚合法合成丙烯腈(AN)与衣康酸(IA)的共聚物。借助傅里叶变换红外光谱和差示扫描量热分析研究了共聚单体IA含量对聚丙烯腈(PAN)结构及环化反应动力学的影响。结果表明,IA的加入促进环化反应在低温下引发,并有效缓解集中放热。随着IA含量的增加,放热反应速率降低,放热峰变宽。采用Kissinger方法计算了不同IA含量的环化反应动力学参数,结果表明,IA可以显著降低环化反应的活化能。但是随IA含量的增加,自由基机理引发的反应活化能增加。Polyacrylonitrile homopolymer （PAN） and copolymers with itaconic acid （IA） were prepared by solution copolymerization. The effect of IA content on the structure and kinetics of cyclization reaction of polyacrylonitrile polymers were studied by FTIR and DSC. It was found that the introduction of IA promoted the cyclization initiated at low temperature and eased the heat concentration. With the increasing amount of IA, the rate of exothermie reaction decreased with a broadened exothermic peak. Kinetic parameters of cyclization of PAN and P（AN-co-IA） were obtained from the Kissinger method, It showed that the activation energy of cyelization reaction was significantly reduced by the incorporation of IA. However, the Ea of cyclization that initiated through radical mechanism increased with IA content.

关 键 词：聚丙烯腈 衣康酸 环化反应 动力学 

分 类 号：O643.1[理学—物理化学]