Metal polyurethane/hollow spheres composites were prepared by casting method with polyurethane resin(P6)and 316L stainless steel hollow spheres(316L HS).The results of DMA test show that the initial energy storage modulus of PU P6/316L HS is nearly 3 times higher than that of pure PU P6,and the energy storage modulus of PU P6/316L HS changes greatly with the increase of temperature.The damping loss factor tanδ-temperature diagram shows that the glass transition temperature of pure polyurethane P6 is 88℃,and the effective damping temperature range is 30℃(67℃～97℃),while the glass transition temperature of polyurethane P6/316L HS is 82℃,and the effective damping temperature range is 33℃(72℃～105℃).The effective damping temperature of pure PU P6 and PU P6/316L HS shifts towards the high temperature region.The thermal decomposition performance test shows that the thermal decomposition of polyurethane P6 is mainly divided into 3 stages:the initial decomposition temperature is 109.30℃,the peak temperature of the fastest thermal decomposition rate is 338.37℃,the percentage of weight loss is 63.69%,the decomposition temperature is 480.43℃,and the residual rate is 6.19%at 700℃.
关键词
聚氨酯/不锈钢空心球/阻尼/玻璃化温度
Key words
Polyurethane/Stainless steel hollow ball/Damping/Glass transition temperature
维普
万方数据