采用阳离子开环乳液聚合法制备了含有双键的聚硅氧烷乳液(PSiO)。以丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)等为主要单体,乙氧基化三羟甲基丙烷三丙烯酸酯(EO9TMPTA)为交联剂合成了一系列聚硅氧烷/丙烯酸酯(PSiOA)乳液。采用傅里叶红外光谱和透射电镜表征乳液的结构形态。考察了EO9TMPTA用量对PSiOA乳液的稳定性、粒径、流变行为和对乳胶膜的吸水率、拉伸性能等各项性能的影响。结果表明:随着EO9TMPTA用量的增加,乳液凝聚率、黏度增大,胶膜的热稳定性、耐水性等综合性能得到了较大提高。当 m(EO9TMPTA)=3g时,综合性能达到最佳,拉伸强度为5.62MPa,断裂伸长率为653%。
Polysiloxane emulsion (PSiO) containing double bonds were prepared by cationic ring-opening emulsion polymerization.Butyl acrylate (BA) and methyl methacrylate(MMA) were used as the main monomers,ethoxylated trimethylolpropane triacrylate(EO9TMPTA) as crosslinking agent,synthesized a series of polysiloxane/acrylic emulsion.The structure and morphology of emulsion were characterized by fourier transform infrared spectroscopy(FT-IR) and transmission electron microscopy(TEM).The effect of EO9TMPTA dosage on the stability,particle size,rheological behavior of PSiOA emulsion,water absorption,tensile properties,thermal properties and DSC properties of latex film were investigated.The results showed that with the increase of EO9TMPTA content,the emulsion aggregation rate and viscosity increased,and the thermal stability,water resistance and glass transition temperature (Tg) and other comprehensive properties of latex film were greatly improved.When m(EO9TMPTA)=3g,the comprehensive performance reached the best,the tensile strength was 5.62MPa and the elongation at break was 653%.
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基金资助
陕西省重点研发计划(2017GY-154);陕西省教育厅重点实验室项目(16JS011);陕西省重点研发计划项目(2018KW-007);创新人才推进计划-科技创新团队项目(2018TD-015)
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