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缠绕用低温快速固化氰酸酯树脂的改性
韩晓艳,肖军,李金焕,刘丽
南京航空航天大学材料科学与技术学院,南京 210016
摘要:
针对湿法缠绕工艺,在不影响固化温度条件下用TDE-85对氰酸酯树脂进行改性,对改性前后树脂性能进行对比研究。结果表明:环氧与催化剂混合物在40℃时黏度低于1Pa·s,且能维持超过214min,能够满足湿法缠绕的工艺需求;环氧含量低于10wt%时,起始固化温度不超过77℃,在80℃的凝胶时间为30min左右,仍满足低温快速固化要求;当TDE-85含量为10wt%时,树脂浇铸体力学性能最优,其拉伸强度、弯曲强度、冲击强度分别为46.2、83.4MPa、10.8kJ/m2;但环氧的加入对氰酸酯的吸湿性和耐热性能均有一定负面的影响。
关键词:  氰酸酯树脂  TDE-85环氧树脂  低温快速固化  力学性能  纤维缠绕
DOI:10.12044/j.issn.1007-2330.2019.02.008
分类号:TQ323.9,TB332
基金项目:国家重点基础研究发展计划 2014CB046501 国家重点基础研究发展计划(2014CB046501)
Modification of Low Temperature Rapid Curing Cyanate Ester Resin Used for Wet Winding Molding
HAN Xiaoyan,XIAO Jun,LI Jinhuan,LIU Li
College of Material Science & Technology, Nanjing University of Aeronautics & Astronautics,Nanjing 210016
Abstract:
TDE-85 was used to modify cyanate resin without affecting curing temperature. The modification was investigated by the test of viscosity-temperature characteristics, differential scanning calorimetry, fourier transform infrared spectroscopy, mechanical test, water absorption, and thermal gravimetric analysis.The results show that the viscosity of epoxy and catalyst mixture at 40℃ is less than 1Pa·s, and the sustaining time is longer than 214min that is suitable for the wet winding molding. When the epoxy content is less than 10%, the initial curing temperature does not exceed 77℃, and the gel time at 80℃ is about 30minutes that meet the requirements for low-temperature rapid curing. The modified cyanate ester resin castings with 10% of TDE-85 epoxy resin has the best overall performance and the tensile strength, flexible strength and impact strength are 46.2 MPa, 83.4 MPa and 10.8 kJ/ m 2 , respectively. However, the addition of epoxy has a negative effect on the moisture resistance and heat resistance of cyanate esters
Key words:  Cyanate ester  TDE-85 Epoxy resin  Low-temperature rapid curing  Mechanical properties  Wet winding molding