淀粉基阳离子苯丙无皂乳液的合成与性能研究

Study on synthesis and performance of soap-free starch-based cation styrene-acrylate emulsion

以淀粉为主链、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为功能单体、苯乙烯(St)和丙烯酸丁酯(BA)为改性单体,采用种子乳液共聚法制备了无皂淀粉基阳离子苯丙乳液。讨论了反应条件对该乳液稳定性及乳胶膜性能等影响,并采用红外光谱(FT-IR)法对乳液聚合物结构进行了表征。结果表明:当m(DMC)∶m(淀粉+St+BA)=0.8∶1、m(淀粉)∶m(St+BA)=1.00∶3、m(St)∶m(BA)=1.50∶1、反应温度为80℃、w(引发剂)=2%且m(过硫酸钾KPS)∶m(NaHSO3)=2∶1时,改性乳液的综合性能最佳。

With starch as main chain segment,DMC as functional monomer,styrene（St） and butyl acrylate（BA） as modified monomers,so a soap-free starch-based cation styrene-acrylate emulsion was prepared by seed emulsion copolymerization.The influences of reaction conditions were discussed on emulsion stability and emulsion film performances,the structure of emulsion polymer was characterized by FT-IR method.The result showed that the modified emulsion had optimal combination property when mass ratio of m（DMC）∶m（starch＋St＋BA）,m（starch）∶m（St＋BA） and m（St）∶m（BA） were 0.8∶1,1.00∶3 and 1.50∶1 respectively,copolymerization temperature was 80 ℃,mass fraction of initiator was 2% and mass ratio of m（KPS）∶m（NaHSO3） was 2∶1.