2,2′-联吡啶与丙二腈对苯乙烯活性自由基聚合的影响  

2,2′-Bipyridine and Malononitrile as Additives for Styrene Living Radical Polymerization

作　　者：黄剑莹[1] 林建[1] 李万利[1] 颜明发[1] 林明华[1] 邹友思[1] 

机构地区：[1]厦门大学材料科学系,固体表面物理化学国家重点实验室,福州厦门361005

出　　处：《合成化学》2002年第6期551-553,共3页Chinese Journal of Synthetic Chemistry

基　　金：固体表面物理化学国家重点实验室基金资助项目 (1130 )

摘　　要：研究了稳定自由基存在下苯乙烯的活性聚合。发现在 2 ,2′ 联吡啶的存在下 ,苯乙烯聚合的分子量控制效果提高 ,分子量可控 ,分子量分布较窄。在与丙二腈共同作用时 ,可在 4h内达到 85 %的转化率 ,分子量分布在 1 .5以下 ,分子量控制误差在 2 0 %以下。设计分子量在 1 0 ,0 0 0 90 ,0 0 0 。Living free radical polymerizations of styrene were studied using benzoyl peroxide as an initiator in the presence of TEMPO(2,2,6,6-tetramethylpiperidinyl-1-oxy). The effect of MN/bpy malononitrile/2,2′-bipyridine additives on the control of molecular weight is explored. It was found that styrene polymerization was distinctly accelerated by MN/bpy additives and the theoretic molecular weight tallie well with the experimental molecular weight. Using the additives in a 1∶1.2 molar mixture of BPO and TEMPO with mol bpy∶mol TEMPO=2∶1, mol MN∶mol TEMPO=2.5 at 135℃, the conversion of the styrene polymerization reached 85%, the polydispersitics is below 1.5 and the difference between the theoretic molecular weight and the experimental molecular weight was controled below 20%.

关 键 词：稳定自由基 活性自由基聚合 丙二腈 2 2’-联吡啶 

分 类 号：O621.3[理学—有机化学] O623.[理学—化学]