Fracture toughness of difunctional epoxy resin/thermally latent initiator system modified with polyesters
Fracture toughness of difunctional epoxy resin/thermally latent initiator system modified with polyesters
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DOI：
10.1016/j.jiec.2008.04.003
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发表时间：
2008-09
影响因子：
6.1
通讯作者：
F. Jin;Soojin Park
中科院分区：
文献类型：
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作者：
F. Jin;Soojin Park
采用芳香族聚酯作为改性剂，对双酚A二缩水甘油醚（DGEBA）/热潜伏性引发剂体系进行增韧改性。使用N-苄基喹喔啉鎓六氟锑酸盐（BQH）作为用于热固化的热潜伏引发剂，并且聚酯的含量在2.5至10重量%之间变化。采用多种技术研究了DGEBA/聚酯共混物的热潜行为、热性能和界面力学性能。结果表明，BQH作为潜伏引发剂在较窄的温度范围内表现出活性。DGEBA/聚酯共混物的K IC高于纯环氧体系的K IC，并且在5wt%聚酯时表现出最大值。扫描电子显微镜（SEM）结果表明，在DGEBA/聚酯共混物的粗糙和塑性变形形态。
Aromatic polyester was used as a modifier to improve the toughness of diglycidylether of bisphenol A (DGEBA)/thermally latent initiator system. N-Benzylquinoxalinium hexafluoroantimonate (BQH) was used as a thermally latent initiator for thermal curing, and the content of polyester was varied from 2.5 to 10 wt%. The thermal latent behaviors, thermal properties, and mechanical interfacial properties of DGEBA/polyester blends were investigated with several techniques. It was found that the BQH as a latent initiator showed the activity at a comparably narrow temperature range in the present study. The K IC of the DGEBA/polyester blends was higher than that of the neat epoxy system and exhibited a maximum value at 5 wt% polyester. The scanning electron microscope (SEM) results showed rough and plastic deformation morphologies in the DGEBA/polyester blends.