摘要
以R-BMI[RTM(树脂传递模塑)用BMI(双马来酰亚胺)树脂体系]为主要原料,研制了一种L-BMI(液晶BMI树脂增韧改性低黏度R-BMI),并对其力学性能、反应性和化学流变特性等进行了探讨。结果表明:L-BMI比R-BMI树脂体系的冲击强度提高了83.33%,其反应活化能为71.13 kJ/mol,并且其具有良好的低黏度工艺平台,116℃时保持低黏度(≤600 mPa.s)的时间为578 min;建立了等温状态下的Dual-Arrhenius黏度模型,由该模型预测的黏度与实测黏度吻合性良好,说明该黏度模型可较准确预测体系的低黏度工艺窗口,为RTM用L-BMI的工艺参数制定提供了理论依据。
With R-BMI[namely BMI （bismaleimide） resin system for RTM （resin transfer molding）] as main raw material,a L-BMI（low viscosity R-BMI toughened and modified by liquid crystal BMI resin） was investigated and prepared,and its some properties（such as mechanical properties,reactivity and chemical rheological properties） were discussed. The results showed that the impact strength of L-BMI was 83.33% more than that of R-BMI resin system,its reaction activation energy was 71.13 kJ/mol,and it had good process platform of low viscosity because the maintaining time of low viscosity（ ≤600 mPa· s） was 578 rain at 116 ℃. The isothermal viscosity model of Dual- Arrhenius was established, and the viscosity model could more accurately forecast process window of low viscosity in system,and could provide theoretical basis in constituting L-BMI＇s process parameters for RTM because the model-forecasting viscosity and fact-testing viscosity were almost same.
出处
《中国胶粘剂》
CAS
北大核心
2012年第10期9-12,17,共5页
China Adhesives
基金
省攻关项目(20051014)
关键词
液晶双马来酰亚胺
增韧
反应性
化学流变模型
树脂传递模塑
liquid crystal bismaleimide
toughening
reactivity
chemical theological model
resin transfer molding （ RTM ）
