摘要
将二胺型苯并噁嗪分别与4种不同结构的环氧树脂(缩水甘油醚型E-51,缩水甘油胺型AG-80,酯环型TDE-85以及海因环氧树脂)按照官能团摩尔比2∶1混合,比较了环氧树脂化学结构对共混树脂性能的影响。黏度测试和差示扫描量热法(DSC)结果显示,共混树脂体系加工性得到改善,固化反应峰向高温移动。热失重分析(TGA)结果表明,共混树脂固化物的热稳定性较聚苯并噁嗪均有所降低。动态力学性能测试(DMA)和弯曲性能测试结果表明,苯并噁嗪/TDE-85、苯并噁嗪/AG-80混合树脂固化物具有较高的交联密度和Tg,增加韧性的同时提高了弯曲强度,而弯曲模量仅有少量下降,综合机械性能较好。
MDA-benzoxazine were mixed with four different epoxy resins（diglycidyl ether-type E-51,glycidyl amine-type AG-80,alicyclic epoxy resin TDE-85 and the HaiYin epoxy resin） respectively,in accordance with the molar ratio of 2∶1 in functional groups.The test of viscosity and the differential scanning calorimetry（DSC） results showed that processability of the blends of epoxy and benzoxazine was improved and the addition of epoxy resin can make the curing reaction of the blends to higher temperature.The thermal gravimetric analysis（TGA） results demonstrated that the addtion of epoxy resin decreasesd the thermostability of polybenzoxazine.Based on the DMA and mechanical test results,the blends of the TDE-85 epoxy resin and benzoxazine as well as AG-80 epoxy resin and benzoxazine had higher Tg and crosslink density,improved toughness and flexural strength over the polybenzoxazine,with only a minimal sacrifice in modulus values.
出处
《化工新型材料》
CAS
CSCD
北大核心
2011年第10期138-142,共5页
New Chemical Materials
关键词
苯并噁嗪
环氧树脂
共混
改性
benzoxazine
epoxy resin
blend
modification
