壳/核结构复合分散相对PP/硅灰石/EPDM体系力学性能的影响  

EFFECT OF SHELLCORE STRUCTURE OF DISPERSED PHASE ON MECHANICAL PROPERTIES OF POLYPROPYLENE/WOLLASTONITE/EPDM COMPOSITES

作　　者：朱晓光[1] 李兰[1] 王德禧[1] 漆宗能[1] 蔡忠龙[2] 

机构地区：[1]中国科学院工程塑料国家重点实验室 [2]香港理工大学应用物理系

出　　处：《高分子材料科学与工程》1998年第1期115-118,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金;香港Research Groat Council资助

摘　　要：应用共混填充制备了ＰＰ／硅灰石／ＥＰＤＭ三元复合物。通过设计界面、控制组分和优化共混工艺得到以ＥＰＤＭ为壳、硅灰石为核的复合分散相。本复合材料具有均衡的力学性能，超高韧性和较好的刚度。文中研究了复合物组分和形态结构对其模量Ｅｃ３、屈服强度σｙｃ３、断裂强度σｂｃ３等力学性能的影响。用理论模型对其进行了分析拟合，与实验数据很好符合。结果表明，复合分散相壳层厚度对Ｅｃ３变化起到决定性的影响，复合体系表观界面粘结性能对σｙｃ３、σｂｃ３变化起到决定性的影响。The PP/Wollastonite/EPDM composites with different volume fractions of rubber and filler were prepared by melt extrusion in a twinscrew extruder. The Wollastonite was pretreated by Silane couping agent. The effect of the morphology and structure of the ternary composites on the modulus (Ec3), yielding stress (σyc3) and stress at break (σbc3) in tensile test were investigated. The experimental data of Ec3, σyc3 and σbc3 were fitted and analyzed by theoretical equations. In comparison the experimental results with the theoretical prediction, the shellcore structure dispersed phase was formed, which increased the apparent volume fraction of rubber and decreased the interfacial adhesion as increasing filler volume fraction. The formation of the shellcore structure dispersed phase affected the mechanical property of the composites.

关 键 词：聚丙烯 硅灰石 三元乙丙橡胶 力学性能 共混 

分 类 号：O631.21[理学—高分子化学] O631.5[理学—化学]