摘要
以离子液体1-丁基-3-甲基咪唑氯化物为溶剂,研究了丙烯腈(AN)与衣康酸(IA)的二元共聚反应。利用红外光谱和元素分析法对聚合物进行了化学结构和组成分析,结果表明在离子液体中制备的AN与IA的共聚物与在常规溶剂中的产物有相同的结构并且组成相近。对共聚反应动力学进行了详细探讨,确定了AN与IA在离子液体中较适宜的反应条件:引发剂偶氮二异丁腈占总单体质量浓度0.8%,总单体质量浓度18%,投料中IA质量浓度2%,温度340 K,反应2h。采用差示扫描量热分析和热失重分析方法对聚合产物热性能进行了研究,结果表明:随着IA在共聚物中含量增加,相应共聚物的环化放热起始温度和峰值温度降低,碳化残留量随着共聚物中IA含量的增加,先增加后减少。
The free radical copolymerization of acrylonitrile（AN） and itaconic acid（IA） in l-buty-3-methy-limidazolium chloride（[bmim]Cl） were investigated.The chemical structure and composition of the copolymers were analyzed by Fourier Transform Infrared Spectroscopy（FT-IR） and elemental analysis.It was shown that the obtained polymers possessed the same structure and composition with that prepared in conventional solvents.The polymerization kinetics was discussed in detail.It was concluded that the proper copolymerization condition for AN and IA copolymerized in[bmim]Cl was as follows：initiator concentration was 0.8%,IA concentration was 2%monomers concentration was 18%,temperature was 67℃and reaction time was 2 hours.The thermal properties of the resulted polymers were analyzed by differential scanning calorimetry（DSC） and thermal gravimetric（TG）.It was found that with the increase of IA content in the copolymer,the initiation and peak temperature of the carbonized cyclization shifted to a lower temperature,while the char yield increased at first and then decreased.
出处
《合成技术及应用》
2011年第2期1-6,24,共7页
Synthetic Technology & Application
基金
上海市教委科研创新项目(02244)
曙光计划跟踪项目(08GG11)的资助
关键词
丙烯腈
衣康酸
离子液体
自由基聚合
热性能
acrylonitrile
itaconic acid
ionic liquid
free radical polymerization
thermal property
