【摘要】 将苯乙烯(S t)、丙烯酸丁酯(BA)双单体在纳米碳酸钙粒子存在下的水相悬浮液中进行无皂乳液聚合,制备出纳米碳酸钙聚合物复合微粒,研究了复合微粒对改性纳米C aCO3/ABS复合材料力学性能的影响及增韧机理。结果表明,复合微粒以纳米级均匀分散在基体中,与基体间形成良好的柔性界面层;复合材料的断面产生了大量的滑移和褶皱,起到了吸收和分散机械力的作用。当单体的配比和种类适当时,复合微粒对ABS有很好的改性作用,其填充量为3份(质量)时,复合材料单缺口冲击强度达到40.6kJ/m2,比纯ABS提高24.5%,拉伸强度基本不变。更多还原

【Abstract】 Nano-calcium carbonate/polymer composite particle was prepared by polymerization of styrene（St） and butyl acrylate（BA） on the surface of nano-CaCO₃ in aqueous suspension.The effects of composite particle to the structure and the mechanical properties of nano-CaCO₃/ABS composite material and the toughening mechanisms were studied.The results show nano-CaCO₃ particles disperse well in matrix at nano-scale and it exists flexible interface between them.Drape and slippage ’structure exists in the composite materials,which takes effect on adsorption and dispersion mechanical energy.When the ratio and sort of monomer are rational,soapless emulsion polymerization with double monomers is a good way of nano-CaCO₃ modification.The single-notched impact strength of composite materials reaches（40.6） kJ/m² and is improved（24.5%） compared to pure ABS as the mass ratio of nano-CaCO₃ composite particle and ABS was 3∶100.更多还原