摘要： 以氯化亚铜（CuCl）／2,2′－联吡啶（bpy）为催化体系，苄基氯为引发剂，采用本体原子转移自由基聚合（ATRP）方法，引发苯乙烯（St）聚合，合成出大分子引发剂聚苯乙烯（PS-Cl）。用此大分子引发剂在溶液体系下引发第二单体甲基丙烯酸甲酯（MMA）聚合，合成出 PS-PMMA-Cl二嵌段聚合物。再以此二嵌段聚合物为大分子引发剂引发甲基丙烯酸丁酯（BMA）聚合，合成出三嵌段聚合物 PS-PMMA-PBMA。运用凝胶色谱、红外光谱、核磁共振氢谱及差示扫描量热技术等对三嵌段聚合物进行表征。

关键词: 原子转移自由基聚合, 大分子引发剂, 三嵌段聚合物, 聚苯乙烯, 聚甲基丙烯酸甲酯, 聚甲基丙烯酸丁酯

Abstract: With CuCl-bpy as catalyst and benzyl chloride as initiator, styrene was initiated by means of atom transfer radical polymerization(ATRP) to synthesis macro-initiator PSCI, which was used to initiate the second monomer methyl methacrylate to produce diblock polymer PS-PMMA-Cl under the solution system. Then the PS-PMMA-Cl was used as the macro-initiator to initiate butyl methacrylate polymerization to synthesis PS-PMMA-PBMA tri-block polymers. The tri-block copolymers were characterized by gel permeation chromatography (GPC ) infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H-NMR )and differential scanning calorimetry (DSC).

Key words: atom transfer radical polymerization, macro-initiator, tri-block polymers, PS, PMM, PBMA