界面应力对玻纤增强HDPE 基体伸展链晶体的诱导作用

本文采用SEM、SAL S、DSC 和材料力学性能实验等方法考察了界面粘结性、玻纤含量和试样熔体成型冷却速率等与其GF/ HDPE 复合材料基体晶态结构及材料力学性能间关系。实验结果表明: 在界面相存有较牢固的化学偶联作用条件下, 其材料试样熔体成型冷却过程中所产生的界面应力可应变诱导玻纤周围基体树脂伸展链晶体结构的形成, 并由此而明显改善了复合材料的拉伸、弯曲强度及其缺口冲击韧性。

INDUCTION OF INTERFACIAL STRESS ON THE EXTENDED-CHAIN CRYSTALS OF MATRIX OF GLASS FIBER-REINFORCED HDPE

In this paper, the influences of interfacial adhesion and glass fiber content and cooling rate of the specimen melts in injection molding process on the matrix crystal structure and mechanical properties of GF/HDPE composites were investigated by using SEM, SALS, DSC, material universal testing machine, etc. The results show that the produced interfacial stress from the shrinkage of specimen melts in injection molding process can strain induce the forming of the extended chain crystals in the matrix and obviously improves the mechanical properties of the composites.