环境因素对玻璃纤维增强聚丙烯界面的损伤

采用单丝临界长度法测定玻璃纤维增强聚丙昨合体系的界面剪切强度,研究了湿热及交替变化的温度等环境因素对复合体系界面的损伤。结果表明,湿热及高、低温的冷热循环均能引起玻璃纤维与聚丙烯复合体系的界面脱粘;采用偶联剂处理玻璃纤维、在体系中形成较强的界面粘结（如化学键结合）,可提高复合体系界面抗湿热损伤的能力,在复合体系中引入容易变形的界面以生层可提高体系界面的冷热循环疲劳性能,界面结合较强的复合体系经冷热

Environmental Damage to Interface of GF/PP

s In this paper the environmental damage to interface of glass fiber reinforced PP(GF/PP)was studied by measuring interfacial shear strenght with a single silament fragmentation technique.The results showed the interfacial debonding would take place either in a hydrothermal environment or undergoing thermal cold cycle.When the glass fiber was treated by coupling agent to form strong interfacial bond,the hydrothermal stability of the interface would be increased.The introduction of flexible interlayer could reduce the thermal cold fatigue of interface.Compared with the composite of weak interfacial adhesion,the composite with good interfacial adhesion showed more retention in interfacial bond strength after thermal cold cycling.