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采用乳液接枝共聚方法,合成了氧化淀粉-甲基丙烯酸甲酯-丙烯酸乙酯-丙烯酸接枝共聚物乳液,并用该乳液制备了新型酯溶性可降解港宝化学片。试验结果表明合成共聚乳液的最佳条件为:氧化淀粉添加量为单体质量总量的15%,m(MMA):m(EA):m(AA)=75:22:3,m(十二烷基硫酸钠):m(烷基酚聚氧乙烯醚)=1:2,乳化剂用量为3·0%,引发剂用量为0.6%,温度为80℃。研制出的新型酯溶性可降解港宝化学片邵氏D硬度为53,黏合强度为7N·mm-1,拉伸性能为13MPa,酯溶性为57%。
Oxidized starch-methyl methacrylate-ethyl acrylate-acrylic acid graft copolymer emulsion was synthesized by emulsion graft copolymerization method. A novel ester-soluble biodegradable Gangbao chemical tablet was prepared by emulsion polymerization. The results showed that the optimal conditions for the synthesis of the copolymerization emulsion were as follows: the amount of oxidized starch added was 15% of the total mass of the monomers, the molar ratio of m (EA): m (AA) = 75: 22: 3, Sodium dialkyl sulfate): m (alkylphenol polyoxyethylene ether) = 1: 2, the amount of the emulsifier is 3.0%, the amount of the initiator is 0.6% and the temperature is 80 ° C. Developed a new ester-soluble biodegradable Gangbao chemical Shaw D hardness of 53, bonding strength of 7N · mm-1, tensile properties of 13MPa, 57% ester solubility.