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1 Pa·s,且能维持超过214 min,能够满足湿法缠绕的工艺需求;环氧含量低于10 wt%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10 wt%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、83.4 MPa、10.8 kJ/m^2;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。
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.
作者
韩晓艳
肖军
李金焕
刘丽
HAN Xiaoyan;XIAO Jun;LI Jinhuan;LIU Li(College of Material Science & Technology, Nanjing University of Aeronautics & Astronautics,Nanjing 210016)
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2019年第2期41-45,共5页
Aerospace Materials & Technology
基金
国家重点基础研究发展计划(2014CB046501)
