通过手糊的方法制备了γ-缩水甘油醚氧丙基三甲氧基硅烷(GPTMS)含量不同的玻璃纤维/环氧树脂(GF/EP)复合材料。结果表明:与未添加GPTMS的GF/EP复合材料相比,加入质量分数5%的GPTMS不仅提高了复合材料的机械性能,而且改善了其吸水性能。但是,随着GPTMS含量的增加,复合材料机械性能开始下降,吸水能力开始提升。玻璃纤维和环氧树脂界面结合强度的变化极大地影响了复合材料的机械性能和吸水量。此外,当GPTMS质量分数达到10%和15%时,可以明显观察到复合材料的脆-韧转变现象,这归因于复合材料自由体积的增加。
Glass fiber-reinforced epoxy resin (GF/EP) composites containing different amounts of γ-glycidyloxipropyltrimethoxysilane (GPTMS) were prepared by hand lay-up method.Experiment results indicated that the incorporation of 5wt% GPTMS improved the mechanical properties and water absorption behaviours of GF/EP composites.However,with the amount of GPTMS increasing,the mechanical properties of the composites began to decrease and water adsorption capacity of the composites began to increase.The change of interfacial bonding strength between GF and EP greatly affected the mechanical properties and water adsorption of composites.Moreover,the brittle/tough transition phenomenon was observed for the composites that added 10wt% and 15wt% GPTMS,which can be explained by the variation of free volume.
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