聚酯热熔胶增韧环氧树脂  

Epoxy Resin Toughened by Polyester Hot Melt Adhesive

作　　者：钟银花[1] 罗炎[1] 曾剑[1] 韦英林[1] 吴业辉[1] 

机构地区：[1]桂林电子科技大学材料科学与工程学院,桂林541004

出　　处：《应用化学》2012年第7期745-750,共6页Chinese Journal of Applied Chemistry

基　　金：桂科能项目资助(0710908-04-Z);桂林电子科技大学大学生创新项目基金(091059529)

摘　　要：利用扫描电子显微镜研究了聚酯热熔胶PE30增韧环氧树脂的微观相结构;利用DSC、DMA和TGA研究了聚酯热熔胶PE30对环氧树脂耐热性能的影响;测试了环氧树脂的冲击强度、弯曲强度和断裂韧性,考察了聚酯热熔胶PE30对环氧树脂力学性能的影响。结果表明,聚酯热熔胶PE30的最佳质量分数为15%,在固化过程中环氧体系发生诱导相分离,相结构由单相到连续相再到反转相;断裂韧性和冲击强度分别提高了127%和250%;弯曲强度和弯曲模量分别降低27%和44%;而体系玻璃化转变温度与起始热失重温度下降约1.5%,损耗峰温度下降约2.5%,说明聚酯热熔胶PE30可以在很大程度上提高环氧树脂的韧性,同时保持其耐热性能基本不变。The micro structures of epoxy toughened by polyester hot melt adhesive PE30 was studied by SEM. The influence of addition polyester hot melt adhesive PE30 on heat stability of epoxy was studied by DSC, DMC, and TGA. The mechanical properties, including impact strength; bending strength, fracture strength were measured. The results showed that a suitable usage of PE30 is 15%. In the process of curing, the epoxy resin matrix containing polyester hot melt adhesive came out and induced a phase separation, from the single- phase to continuous phase and then to reverse phase. Comparing with the pure epoxy resin, the impact strength and fracture strength were increased by 250% and I27%, respectively. The bending strength and modulus were reduced by 27% and 44%, respectively. The glass transition temperature and starting thermo- gravimetric temperature were reduced by 1.5%, and mechanical loss peak temperature was reduced by 2. 5%. h is show that the polyester hot melt adhesive PE30 can significantly toughen the epoxy resin while maintain its thermal performance.

关 键 词：聚酯热熔胶 增韧 环氧树脂 诱导相分离 

分 类 号：O631.2[理学—高分子化学]