双金属催化5-乙烯基-2-降冰片烯与甲基丙烯酸特丁酯共聚

Copolymerization of 5-vinyl-2-norbornene and tert-Butyl Methacrylate Catalyzed

摘要:

研究了双金属催化剂Fe(acac)3-Al(i-Bu)3(acac=乙酰丙酮)催化5-乙烯基-2-降冰片烯（ENB）与甲基丙烯酸特丁酯（TBMA）共聚反应条件影响、第三组份影响. 并用核磁共振、红外光谱方法研究了共聚物的组成，用凝胶渗透色谱分析了聚合物的分子量及分布。

Abstract:

The characteristics of copolymerization of 5-vinyl-2- norbornene and tert-butyl methacrylate by Fe(acac)3-Al(i-Bu)3 and the structure of the copolymer are presented in the paper. All polymerization reactions were carried out under nitrogen atmosphere using syringe technic. The copolymer is characterized by IR、NMR and element analysis. The copolymerization can be performed in the solvents such as aromatic hydrocarbon. The suitable Al/Fe molar ratio is 23. The molecular weight distribution is Mw/Mn=1.18-1.39, The molecular weight of copolymer is changed with the change of ENB/TBMA molar ratio. 5-vinyl-2- norbornene and tert-butyl methacrylate are 45.5% and 55.5%, respectively in the copolymer. The third composition exerts influence on the copolymerization. The yield of copolymer are lower with the third composition than that without the third composition. The copolymerization can be obtained at room temperature, however, the increasing reaction temperature causes an increase of the copolymer yield. The yield of copolymer is changed with the change of Al/Fe molar ratio. The suitable Al/Fe molar ratio is 23.