苯乙烯-丙烯酸酯树脂/纳米SiO_2核壳乳液的制备及性能

The properties and preparation of styrene acrylic emulision/nano-SiO_2 with core-shell structure

以聚乙烯醇为保护胶体,以含双键的纳米SiO2粉体与丙烯酸酯类单体通过原位无皂乳液聚合合成了苯乙烯-丙烯酸酯树脂/纳米SiO2核壳乳液。通过红外光谱(FT-IR)、透射电镜(TEM)、扫描电镜和接触角测试对杂化材料进行表征,结果表明纳米SiO2和丙烯酸酯之间产生了化学键的结合,两者复合达到分子水平。材料力学性能和耐水性均好,其中拉伸强度最高可达5.5N/mm2,断裂伸长率可达到102%;耐水性最低为12.5%。

Styrene acrylic emulision（SAE） /SiO2 core-shell structure hybrid materials was prepared by emulsion polymerization with unsaturated（RNS-D） as a silica component and polyvinyl alcohol（PVA） as polymeric colloid stabilizer.Hybrids were characterized by TEM,FT-IR,the result indicated RNS-D which surface is modified by unsaturated organic compounds was used as a monomer taking part in the reaction completely.The morphology of hybrids latex coats was observed via scanning electron microscope（SEM）.The best mechanical properties and water resistance were obtained,the tensile strength was up to 5.5N/mm2 at the same time the elongation at break reached 102%.The incorption of nano-SiO2 has a toughening and reinforcing effect.The water absorption reached lowest value was 12.5%.