应用化学 ›› 1992, Vol. 0 ›› Issue (1): 87-88.
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梁良, 应圣康
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Liang Liang, Ying Shengkang
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摘要： 聚α-甲基苯乙烯-丁二烯-α-甲基苯乙烯嵌段共聚物是一种性能优异的热塑性弹性体。常温下,α-甲基苯乙烯的聚合是在极性添加剂存在下进行的,添加剂的种类,用量及聚合温度不仅影响聚合动力学,尚且影响聚合物分子量及其分布[1]。控制α-甲基苯乙烯聚合速率、分子量及分子量分布是制备性能优异的上述三嵌段共聚物的关键。本文报道了以正丁基铿为引发剂、环己烷为溶剂,α-甲基苯乙烯为单体的聚合体系中,不同醚类添加剂、添加剂与引发剂摩尔比,聚合温度对聚α-甲基苯乙烯分子量分布的影响。
关键词: 阴离子聚合, α-甲基乙苯烯, 分子量分布
Abstract: The molecular weight distribution of polyalpha-methylstyrene prepared by anionic polymerization, with n-butyllithium as initiator was investigated. The influences of ether additives, ratios of ether to initiator and polymerization temperature on the molecular weight distribution of polymers were studied.Thereactivity of reactive species and rate of interchange between the reactive species were considered as the main factors effecting the molecular weight distribution of the polymer.With increasing polymerization temperature and by using more strong and concentrated ether additive the molecular weight distribution of the polymer became more narrow.
Key words: anionic polymerization, alpha-methylstyrene, molecular weight distribution
梁良, 应圣康. α-甲基苯乙烯离子聚合体分子量分布[J]. 应用化学, 1992, 0(1): 87-88.
Liang Liang, Ying Shengkang. MOLECULAR WEIGHT DISTR IBUTION OF POLYALPHA METHYLSTYRENE[J]. Chinese Journal of Applied Chemistry, 1992, 0(1): 87-88.
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