引发剂体系对AN-MAA本体共聚合的影响  

Influence of initiation system on bulk copolymerization of AN-MAA

作　　者：刘良威[1] 张广成[1] 陈挺[1] 齐凯亮[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710129

出　　处：《合成树脂及塑料》2011年第4期13-17,共5页China Synthetic Resin and Plastics

摘　　要：以聚合热力学为基础,研究了引发剂体系对丙烯腈(AN)-甲基丙烯酸(MAA)本体共聚合的影响。不同活性的偶氮二异丁腈(AIBN)和偶氮二异庚腈(ABVN)单独引发AN-MAA共聚合时,不能消除暴聚现象。采用AIBN/ABVN复合引发剂且复合引发剂半衰期为63.4～117.1h、总用量为0.12～0.24phr、聚合温度为40～44℃时,调节反应条件,可获得良好的聚合效果。采用聚合初、后期高温,中期降温的变温聚合工艺可显著削弱AN-MAA本体共聚合自动加速的现象,使暴聚得到更有效地控制。The influence of initiation systems on buik copolymerization of acrylonitrile and methacrylic acid （AN-MAA） was studied on the basis of polymerization thermodynamics. Flash polymerization could not be eliminated in case the bulk copolymerization of AN-MAA was initiated individually by either azodiisobutyronitrile （AIBN） or azobisisoheptonitrile（ABVN） with different initiation activity. The high polymerization efficiency could be acquired by adjusting reaction conditions as follows： composite initiating agent AIBN/ABVN with half-life of 63.4-117.1 h and total content of 0.12--0.24 phr at the temperature of 40--44 ℃. The polymerization process adopting higher temperature at both the incipient and later stage and lower temperature at the mid stage could remarkably alleviate the phenomenon of spontaneous acceleration in the bulk copolymerization, and thereby controlled effectively the flash polymerization.

关 键 词：丙烯腈 甲基丙烯酸 引发剂 本体聚合 热力学 

分 类 号：TQ328[化学工程—合成树脂塑料工业]