节点文献
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
【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 ,实测分子量和理论分子量相近
【Abstract】 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%.
【Key words】 living free radical polymerization； TEMPO； malononitrile； 2,2′-bipyridine；
- 【文献出处】 合成化学 ,Chinese Journal of Synthetic Chemistry , 编辑部邮箱 ,2002年06期
- 【分类号】TQ316.3
- 【被引频次】2
- 【下载频次】81