聚4-乙烯基吡啶的合成与表征

Synthesis and characterization of poly(4-vinylpyridine)

以过氧化二苯甲酰(BPO)为引发剂,用悬浮聚合的方法制备了较高相对分子质量的聚4 乙烯基吡啶(P4VP)。通过对聚合产物相对分子质量测试结果的分析,研究了单体与水的体积比、引发剂用量、分散剂用量、反应时间、反应温度、搅拌速度等因素对4 VP聚合反应的影响。结果表明,聚合时间为1h、聚合温度为60℃、引发剂的质量分数(占单体量)为0.8%左右、分散剂的质量分数(占单体量)为0.6%、搅拌速度为300r/min时,P4VP的重均分子量就能达到6×105～9×105。另外,采用紫外吸收光谱(UV)、红外吸收光谱(IR)、核磁共振氢谱(1H NMR)、核磁共振碳谱(13C NMR)、热重 差热分析(TG DTA)等测试手段研究了P4VP的结构和性能。

The radical suspension polymerization of 4-vinylpyridine in water medium using BPO as initiator was carried out.The main factors of suspension polymerization,such as monomer, initiator, dispersant, reaction time ,temperature, stirring speed have been studied by analyzing the molecular weight of product.On the basis of the preceding work,we can conclude that optimal parameters are: the ratio of initiator and monomer(m/m) is 0.8%,the ratio of dispersant and monomer(m/m) is 0.6%,reaction time is 1 hour,reaction temperature is 60?℃,stirring speed is 300?r/min.Otherwise, UV、IR、()~1H-NMR、()^(13)C-NMR、TG-DTA have been used to characterize the poly(4-vinylpyridine) .