两性淀粉基天然高分子聚合物的合成及其速溶性的影响因素

研究了以淀粉为基材,以丙烯酰胺(AM)、丙烯酰氧乙基三甲基氯化铵(AAC)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为聚合单体,采用溶液聚合技术合成两性接枝共聚物的方法。考察了引发剂用量、反应温度、反应时间、溶解助剂用量、络合剂用量等因素对单体转化率、接枝率、产物特性粘数及溶解性的影响。最佳反应工艺条件为:引发剂的质量分数为0.1%,m(单体)∶m(淀粉)=7∶3,反应温度50℃,反应时间4 h。所得产物的接枝率为217.92%、转化率为93.74%、特性粘数为543.31 mL/g。

Synthesis of amphoteric inartificial polymer using starch as base material and factors affecting its solubility

The amphoteric graft copolymer was synthesized by copolymerization of starch with acrylamide,acryloyethyl trimethyl ammonium chloride and 2-acrylamino-2-methylpropanesulfonate in aqueous solution.The influences of concentration of initiator,reaction temperature,reaction time,concentrations of solubilizer and concentrations of EDTA-2Na on the monomer conversion,grafting ratio,intrinsic viscidity and solubility were investigated.Following is the optimum reaction condition: mass concentration of initiator,0.1%;monomer/starch(in mass),7∶3;reaction temperature,50 ℃;reaction time,4 h.The grafting ratio,monomer conversion,and intrinsic viscidity achieve 217.92%,(93.74%,) and 543.31 mL/g,respectively.