摘要
用ODPA取代PMR-15中的BTDA,并在二酐中加入PMDA,通过共聚方法合成了ODPA/PMDA-MDA共聚PMR聚酰亚胺树脂系列。通过试验对树脂的溶液粘度、工艺性能、固化后的热氧化稳定性和弯曲性能进行了表征,并探讨了树脂结构与性能的关系。实验结果表明:树脂溶液粘度随分子量增大而增大,随PMDA含量增加而减小;树脂的Tg随分子量增大而降低,随PMDA含量增大而升高;树脂的软化温度随分子量和PMDA含量的增大而提高;而树脂的热失重温度和弯曲性能变化则较复杂。
ODPA was used to replace BTDA in PMR-15, and PMDA was added into dianhydride. ODPA/PMDA-MDA PMR copolyimide resin system was synthesized with copolymerization. The resin-solution's viscosity, the processing property, the thermal-oxidation stability and the flexural property of cured resins were characterized. The relationship between the resin structure and the properties of the resin was also researched. The experimental results show that the resin-solution's viscosity increases with the increase of molecular weight and decreases with the increase of PMDA content. Tg of resin decreases with the increase of molecular weight and increases with the increase of PMDA content. Softening temperature of resin increases with the increase of molecular weight and PMDA content. The temperature of resin weight loss and the flexural property change complicatedly.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2003年第6期7-10,共4页
Acta Materiae Compositae Sinica
基金
国家自然科学基金项目(59833110)
国家863资助项目(2001AA335020)
关键词
复合材料
树脂基体
聚酰亚胺
共聚聚酰亚胺
PMR
Composite materials
Copolymerization
Molecular weight
Resins
Thermooxidation
Viscosity of liquids
