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用Cu(phen) 2 Br/1 PEBr催化引发体系合成了分子量为 50 0 0左右的溴端基聚苯乙烯 (PS Br) .以后者为大分子引发剂 ,在Cu( phen) 2 Br存在下引发甲基丙烯酸甲酯 (MMA)或丙烯酸丁酯 (BA)聚合 ,合成了二嵌段共聚物PS b PMMA和PS b PBA ,并通过GPC、IR、1H NMR及DSC等进行了表征 .实验发现 ,丙烯酸甲酯(MA)在Phen/CuCl/CCl4 催化引发下发生爆聚反应 ,仅当和异丁基乙烯基醚 (IBVE)才发生可控的自由基共聚合反应 .当MA和IBVE的投料摩尔比为 1∶1时 ,所得共聚物中两种单体链节的组成比为 1∶1 7左右 .
A series of brominated polystyrene (PS Br) with a molecular weight of about 50 0 were synthesized by Cu (phen) 2 Br / 1 PEBr catalysis. The latter was a macromolecular initiator. In the presence of Cu (phen) Induced the polymerization of methyl methacrylate (MMA) or butyl acrylate (BA), and the diblock copolymers PS b PMMA and PS b PBA were synthesized and characterized by GPC, IR, 1H NMR and DSC. , Methyl acrylate (MA) detonates under the catalysis of Phen / CuCl / CCl4, and controlled radical copolymerization only occurs when reacted with isobutyl vinyl ether (IBVE) When the molar ratio is 1: 1, the composition ratio of the two monomer units in the resulting copolymer is about 1: 1.7.