高分子固载化Lewis酸催化剂催化α-甲基苯乙烯聚合反应及其动力学研究 Ⅱ.PS-SnCl_4复合物催化剂 |
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引用本文: | 冉瑞成,贾欣茹,蒋硕健.高分子固载化Lewis酸催化剂催化α-甲基苯乙烯聚合反应及其动力学研究 Ⅱ.PS-SnCl_4复合物催化剂[J].石油化工,1988(1). |
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作者姓名: | 冉瑞成 贾欣茹 蒋硕健 |
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作者单位: | 北京大学化学系,北京大学化学系,北京大学化学系 |
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摘 要: | 应用作者开发的一种高分子载体 Lewis 酸催化剂:聚苯乙烯-四氯化锡复合物(PS-SnCl_4)作为α-甲基苯乙烯正离子聚合的催化剂,在较高的温度下可获得较大分子量的聚合物。求出了该聚合反应的动力学方程为 R_p=k C_(cat)C_(MS)~2,表观活化能为17.6kJ/mol,讨论了不同聚合条件对聚合物分子量的影响。
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Polymerization of a-Methylstyrene Catalyzed by Polymer Supported Lewis Acid Catalysts Ⅱ.Catalyst:PS-SnCl_4 |
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Abstract: | The polymerization of α-methylstyrene catalyzed by a polymer-supportedLewis acid catalyst,polystyrene-stannic chloride complex(PS-SnCl_4),was stu-died.In the cationic polymerization of α-methylstyrene,the kinetic equation ofthe polymerization is R_p=k·C_(cat)·C_(MS)~2,the apparent activation energy of the poly-merization is 17.6kJ/mol,and the lower concentration of the catalyst and thelower temperature of polymerization are favorable for the formation of highermolecular weight poly(α-methylstyrene). |
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