摘要
采用熔融共混法制备了聚苯乙烯/纳米二氧化钛/氢化苯乙烯-乙烯-丁二烯-苯乙烯共聚物(PS/纳米TiO2/SEBS)三元复合材料。研究了SEBS和纳米TiO2用量对复合材料力学性能、扭矩以及热性能的影响。利用扫描电子显微镜对复合材料冲击断面的微观形貌进行了研究。结果表明,PS/纳米TiO2/SEBS复合材料的冲击强度随SEBS含量的增加逐渐增大,拉伸强度随SEBS含量的增加逐渐减小。当PS与纳米TiO2的质量比为97/3、SEBS的用量为8份(质量份,下同)时,复合材料的综合力学性能最佳,其冲击强度为5.626kJ/m2,拉伸强度为25.623MPa;加入纳米TiO2和SEBS都使复合材料的热性能得到了提高;复合材料的最大扭矩与PS相比下降了17N.m,平衡扭矩均为7N.m;SEBS以颗粒状镶嵌到基质中,断口形貌为典型的韧性断裂。
Polystyrene/nano-TiO2/hydrogenated styrene-ethylene-butylene-styrene copolymer composites were prepared via melt blending. The effects of amount of nano-TiO2and SEBS on the mechanical properties, torque ternary and thermal properties of polystyrene were studied. The impact fracture microstructure of composites was observed using SEM. With increasing content of SEBS, the impact strength of polystyrene/nano-TiO2 composites increased and the tensile strength decreased. When the content of SEBS was 8 phr and the weight ratio of PS and nano-TiO2 was 97 ： 3, the mechanical properties were the best. The impact strength of the ternary composites was 5. 626 kJ/m^2, and the tensile strength was 25. 623 MPa. Thermal performance of the ternary composites was increased by the addition of nano-TiOe and SEBS. The maximum torque of the ternary composites decreased by 17 N · m compared with PS with an average torque being 7 N · m. The particles of SEBS embedded in the matrix resulted in a typical ductile fracture.
出处
《中国塑料》
CAS
CSCD
北大核心
2012年第12期57-61,共5页
China Plastics
