摘要
对比分析经历模拟特定环境的环境交变试验、盐雾试验、加速老化试验和太阳辐射试验前后泡沫塑料的压缩强度、闭孔率、线胀系数和热导率等性能。结果表明,HCFC-141b型聚氨酯泡沫塑料经历环境老化后,压缩强度和热导率增加,线胀系数减小,闭孔率略有增加,热导率增加。太阳辐照试验对泡沫性能影响最大,试样SD-4压缩强度提高32%,闭孔率先增加后减少,线胀系数降低19%,热导率升高30%。
In this paper, wet-hot cycling test, salt-fog test, accelerated aging test and solar radiation test were designed to simulate three special environments to test the performance change of HCFC-141b blowing polyurethane plastic foam. Compressive strength, closed cell proportion, liner expansion coefficient and thermal conductivity were tested before and after environment tests. The results indicate that after the three special environment tests HCFC- 141b blowing polyurethane plastic foam have higher compressive strength and thermal conductivity, smaller liner ex- pansion coefficient and equivalent closed cell proportion. Solar radiation test on properties of foam effect maximum. Compressive strength of sample SD-4 increased by 32% , and obturator first increased and then decreased, linear ex- pansion coefficient decreased by 19% , the thermal conductivity increased 30%.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2015年第5期40-43,共4页
Aerospace Materials & Technology
