摘要
将表面改性处理的纳米Si3N4粉体与聚苯硫醚(PPS)熔融共混挤出制备PPS/纳米Si3N4复合材料,通过拉伸、冲击实验及动态力学性能测试考察了纳米Si3N4添加量对复合体系各项性能的影响。结果表明,纳米Si3N4填充PPS基复合材料的力学性能明显优于纯PPS。随着纳米Si3N4添加量的增加,复合材料的拉伸强度增大,当添加量为0.8%时,拉伸强度提高了22%。随纳米Si3N4添加量的增加,复合体系冲击强度增大,当纳米Si3N4添加量为1.2%时,无缺口冲击强度和缺口冲击强度出现最大值,分别比纯PPS增加了33%和41%。动态力学性能测试表明,随着纳米Si3N4添加量的增加,PPS分子链段松弛所需能量增加,松弛过程延长,体系储能模量降低,损耗模量增加。
PPS/nano-Si3N4 composites were prepared via melt blending. The tensile and impact properties were significantly enhanced by filling nano-Si3N4. With the addition of 0.8 wt% Si3N4, the tensile strength of the composite was increased by 22 % based on neat PPS. As the content of Si3N4 increased, both un-notched and notched impact strengths each exhibited a maximum at 1.2 wt%, were increased by 33 % and 41%, respectively, based on neat ones. As Si3N4 powder increased the activation energy of PPS segment relaxation, the storage modulus of PPS/nano-Si3N4 composites reduced, loss modulus increased.
出处
《中国塑料》
CAS
CSCD
北大核心
2008年第12期44-47,共4页
China Plastics
基金
安徽省自然科学基金(050440906)
安徽省教育厅重点基金(kj2007A044)
关键词
聚苯硫醚
纳米氮化硅
复合材料
动态力学性能
polyphenylene sulfide
nanometer silicon nitride
composite
dynamic mechanical property
