材料科学与工艺, 2017, 25(1): 92-96.
10.11951/j.issn.1005-0299.20150350
UHMWPE纤维增强LDPE复合材料的界面形态研究
王遂
1,
,
彭炯
2,
,
王建
3,
1.北京理工大学 化工与环境学院,北京,100081;
2.北京理工大学 化工与环境学院,北京,100081;
3.北京理工大学 化工与环境学院,北京,100081
为实现聚乙烯单聚合物复合材料（ PE SPC）的嵌件注射成型，研究基体与增强体间的界面非常关键.本文采用超高分子量聚乙烯（ UHMWPE）纤维增强低密度聚乙烯（ LDPE）基体，对纤维和基体进行了差示扫描量热仪测试，在偏光显微镜下模拟了基体与纤维的复合过程，研究不同因素对复合材料界面结晶形态的影响.根据DSC确定了UHMWPE和LDPE复合的温度范围在110.98~147.14℃；合适的温度和剪切作用都有利于界面横晶的产生，从而使基体和纤维产生更好的粘结，提高复合材料的力学性能；温度比剪切的影响更大，注射温度设置在125~135℃可在保证纤维与基体复合的情况下不破坏纤维的增强作用；纤维丝之间会相互影响界面结晶形态，部分界面有横晶产生，说明在实际注射成型过程中纤维束或纤维布的结构对基体渗透和界面形成有较大影响.
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