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以聚丙烯(PP)为基体树脂,硅橡胶为增韧剂,线性低密度聚乙烯(LLDPE)为辅增韧剂,制备了一系列的PP/硅橡胶/LLDPE的三元共聚物,考察了PP填充不同配比的硅橡胶共混物的力学性能。结果表明,随着硅胶含量不断的增加,样条的断裂伸长率,弹性模量,冲击强度逐渐增加,样条的拉伸强度随着硅胶的增加而逐渐减少;LLDPE的加入量为15%时,PP/硅橡胶/LLDPE的三元共混体系力学性能最佳;硅橡胶的加入量为20%时,PP/硅橡胶/LLDPE的三元共混体系具有良好的拉伸性能和冲击强度。
A series of terpolymers of PP / silicone rubber / LLDPE were prepared by using polypropylene (PP) matrix resin, silicone rubber as toughening agent and linear low density polyethylene (LLDPE) as auxiliary toughening agent. Mechanical properties of PP filled with different proportion of silicone rubber blends. The results showed that with the increasing of silica gel content, the elongation at break, elastic modulus and impact strength of spline were gradually increased, and the tensile strength of spline was gradually decreased with the increase of silica gel. The addition of LLDPE was 15% , The mechanical properties of the ternary blends of PP / silicone rubber / LLDPE are the best. When the amount of silicone rubber is 20%, the ternary blends of PP / silicone rubber / LLDPE have good tensile properties and impact strength .