摘要
采用溶液共混法将纳米 SiO_2与低相对分子质量聚酰胺(PA-650)分散到环氧树脂中,再与固化剂(T-31)混合,制备了公路修补用纳米 SiO_2与 PA-650改性环氧树脂复合材料,研究了工艺条件对复合材料的固化时间、力学性能、微观形态等的影响,并对改性机理进行了探讨。结果表明,工艺条件对复合材料的性能有重要影响,随纳米 SiO_2含量的增加,力学性能呈现先增后减的变化趋势,当其含量为3%时,材料的综合性能最佳,此时复合材料的剪切强度、冲击强度分别提高了90.7%和670%。
Nano-SiO2 and low molecular weight polyamide （PA-650） were dispersed in an epoxy resin and the system was cured with T-31 aimed at the application of highway repairing. The effects of technological conditions on curing time, mechanical properties, and morphology of nanocomposites were studied. The treatment of nano-SiO2 had obvious effects on the properties of the nanocomposites. With increasing content of nano-SiO2, shear strength and impact strength of the composites exhibited maxima at 3 wt%, which were 90.7 % and 670 % higher than neat resin, respectively.
出处
《中国塑料》
CAS
CSCD
北大核心
2006年第12期44-48,共5页
China Plastics
基金
湖南省自然科学基金(编号:05JJ30087)
湖南省博士后基金
湖南大学自然科学重点项目基金资助
