PC/Ep单向纤维复合材料的力学性能与界面优化

利用聚碳酸酯（ＰＣ）改性环氧树脂（Ｅｐ）基体，以改善其玻璃纤维复合材料的力学性能，并通过与夹层基体的对比研究，考察了复合材料力学性能与界面作用的相互关系。研究了ＰＣ／Ｅｐ共混物基体的反应特性和冲击性能，并对不同的基体考察了单向连续玻璃纤维增强复合材料的预浸料制备工艺、复合材料成型工艺及最终材料的力学性能。结果表明，ＰＣ／Ｅｐ共混物基体在制备工艺和最终材料性能上均优于夹层基体。

EFFECTS OF DIFFERENT PC/EPOXY MATRICES IN UNIAXIAL GFRP ON THE FLEXURAL PROPERTIES

Uniaxial glass fibre reinforced laminates were prepared from epoxy resin containing dissolved polycarbonate(PC) and compared with PC interleafing matrix. The curing kinetic of PC/epoxy matrix showed that PC usually has promoting effects on curing reaction for both anhydride and amine curing hardener, but PC has an significant hindering effects on epoxy diffusion when PC become a continune phase. The impact toughness in amine curing PC/epoxy systems can be increased by 30%. The better interaction between glass fiber and matrix results in the higher improvement of flexural strength to the final toughen uniaxial GFRP, while the PC interleafing matrix has a poor interlaminar adhesion because of the diffusion control effectes of PC on the curing reaction, which resultes in a decrease of flexual strength of composites.