淀粉接枝丙烯酸钠聚合物的水溶液合成

来源期刊：有色金属2010年第4期

论文作者：曹文仲 田伟威 钟宏

文章页码：42 - 44

关键词：化学工程； 共聚； 引发剂； 接枝； 丙烯酸钠单体

Key words：chemical engineering； copolymerization； initiator； graft； sodium acrylate monomer

摘    要：研究淀粉与丙烯酸钠单体在水溶液中的接枝共聚,接枝共聚物通过化学方法活化淀粉大分子,使丙烯酸钠单体成为支链状接枝到淀粉分子上。研究共聚反应中引发剂浓度、单体浓度配比、反应温度、反应时间等对单体转化率、接枝率、产品特性黏度的影响。考察淀粉预糊化对接枝反应的影响。结果表明,聚合最佳反应温度为50℃,接枝聚合反应的时间控制在3h左右为宜,淀粉在70℃下预糊化30m in接枝效率最优。

Abstract: The graft polymerization process of sodium acrylate onto starch is investigated in aqueous solution.The grafted copolymer is synthesized through chemical initiator activated starch in order that sodium acrylate polymer is grafted onto starch as a branched chain.The effects of different initiator,initiating temperature,pH and different ratio of initiator on the sodium acrylate conversion and grafting ratio and specific viscidity are discussed.And the influence of starch pre-gelatinization on graft copolymerization is indicated.The experiment results show that the solution polymerization optimal reaction temperature is 50℃,the optimal reaction time is 3h,and the grafting efficiency is preferable if the starch was gelatinized under 70℃ for 30 minutes.