排序方式: 共有12条查询结果,搜索用时 171 毫秒
1.
采用低密度、大比表面积的纳米Si O2为成核剂,乙烯-醋酸乙烯共聚物/丁腈橡胶(EVA/NBR)为增韧体,通过模压交联发泡制备了高弹性的聚丙烯(PP)发泡材料。研究了EVA、NBR添加量对PP发泡工艺与性能的影响。通过力学性能测试及形貌分析,考察了制备高弹性发泡PP的最佳工艺条件。实验结果表明,当EVA、NBR含量均为12.5%时,发泡PP综合性能最佳,拉伸强度为25 MPa,断裂伸长率为6.8%,冲击强度达到10.9 k J/m2,维卡软化温度为146.8℃。 相似文献
2.
3.
4.
5.
0Cr18Ni8Mo2Al(简称PH13-8Mo)是一种采用双真空冶炼方法获得的高强马氏体沉淀硬化不锈钢。突出特点除拥有高强度外,还有优良的断裂韧性,良好的横向力学性能和在海洋环境中的耐应力腐蚀性能。为准确控制合金成分,减少钢中氢气含量,提高钢的纯洁度,在生产中采用VIM+VAR双真空冶炼工艺。 相似文献
6.
The foamed polypropylene(PP) with excellent mechanical and thermal insulating properties was reinforced by blending chlorinated polyethylene(CPE), followed by compression molding foaming in cross-link. The effects of CPE on the foaming behavior, thermal and mechanical properties of the foamed PP were studied by the measurements of density, thermal conductivity, Vicat softening temperature, tensile strength, impact strength and SEM. The results showed that the foamed PP got the best properties when the weight ratio of CPE/PP was 20 wt%. The density of the obtained foamed PP was as low as 0.37 g/cm~3, the impact strength was 16.5 kJ/m~2, the tensile strength was 17.7 MPa, the thermal conductivity was 0.035 W/(m·K), and the Vicat softening temperature was 112 ℃. 相似文献
7.
8.
9.
以聚磷酸铵(APP)和Al(OH)3为阻燃剂,通过熔融挤出制备了具有阻燃性能的高密度聚乙烯/聚氯乙烯(HDPE/PVC)基木塑复合材料,研究了PVC对木塑复合材料热稳定性及流变行为的影响。热失重分析结果表明:APP和PVC均可促进木粉成炭,同时提高了HDPE的热稳定性;流变测试结果表明:PVC与木粉的相容性较HDPE要好,并能促进木粉在体系中均匀分散,改善木塑复合材料体系的加工流动性;锥形量热测试结果表明:PVC脱氯、Al(OH)3热分解均吸收大量热量,可降低复合材料的热释放速率与热释放总量。 相似文献
10.