玻纤增强环氧树脂复合材料的酸雨循环老化性能与机理

ACID RAIN CYCLING AGING PROPERTIES AND MECHANISM OF UNIDIRECTIONAL GLASS FIBER REINFORCED EPOXY COMPOSITES

针对潮湿和酸雨多发地域的航空器复合材料老化问题,模拟酸雨和湿热(普通热水)环境,研究了单向玻纤增强环氧树脂复合材料(UGFREC)在酸雨和湿热环境下的吸湿-干燥循环老化行为;分析了不同循环次数下的UGFREC的吸水动力学;采用力学测试装置、热力学分析装置和扫描电镜,分别表征酸雨和湿热循环老化前后UGFREC的弯曲性能、层间剪切性能、冲击强度、动态粘弹性、玻璃化转变温度和冲击破坏形貌;初步给出反映酸雨和湿热循环过程中基体树脂与纤维间的界面应力变化模型。

FAF （fly ash fiber） /PVC composites are prepared by the mechanical mixing and hot compression technique. The effect of different modifiers and FAF content on the mechanical and thermal properties and Rockwell hardness is examined. The interface of FAF/PVC is analyzed and tested by SEM. Compared to PVC material, the tests of mechanical properties indicate when FAF treated with KH550, the tensile strength increases by 12% at 40phr FAF content, when FAF treated with intenerate agent, the impact strength increases by 110% at FAF content of 10phr, when the FAF treated with KH550 and intenerate agent, the impact strength increases by 70% and tensile strength increases by 11% at 10 phr FAF content, VIKA softening point is going up with the content of FAF increasing. The results show that the coupling agent and intenerate agent can improve the intensity and toughness of the composites. FAF/PVC can not only improve the properties of PVC, but also decrease the cost.