【摘要】 以丙烯酸甲酯、(卤代)苯乙烯为原料,利用原子转移自由基聚合技术、从主干接枝的合成策略和聚丙烯酸甲酯的碱性水解,实现了两亲性接枝共聚物聚丙烯酸-g-聚(卤代)苯乙烯的可控合成。主链和侧链的分子量可分别通过调整单体与引发剂的投料比和反应时间进行控制。(卤代)苯乙烯单体接枝共聚时,采用单体过量的本体聚合且单体转化率控制在10%以内,可制得分子量分布小于1.30的接枝共聚物,取代基的吸电子能力越强,接枝聚合速率越快。更多还原

【Abstract】 Controlled polymerization of poly(acrylic acid)-g-poly(halogenated styrene) amphiphilic graft copolymers was accomplished by the combination of atom transfer radical polymerization(ATRP),grafting-from technique and hydrolysis of poly(methyl acrylate)-g-poly(halogenated styrene) under basic condition.The molecular weights of the main chain and the side chains could be tuned by the variation of the feed ratios and the controlling of the reaction time,respectively.At the stage of graft copolymerization,a high feed ratio of monomer to initiator and a low conversion(< 10%) of monomer were necessary to get narrow dispersed graft copolymers(M-w/M-n < 1.30).The effect of substitute of styrene on the graft copolymerization rate was explored.The experimental results show that the electron withdrawing substitute accelerates the graft polymerization rate.更多还原