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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。
A kind of L-BMI (liquid-crystalline BMI resin toughening modified low viscosity R-BMI) was developed by using BMI (bismaleimide) resin system of R-BMI [ , And its mechanical properties, reactivity and chemical rheological properties were discussed. The results show that the impact strength of L-BMI is 83.33% higher than that of R-BMI resin, and the activation energy is 71.13 kJ / mol. The L-BMI has a good low-viscosity process platform and low viscosity (≤600 mPa .s) was 578 min. The Dual-Arrhenius viscosity model was established. The predicted viscosity was in good agreement with the measured viscosity, indicating that the viscosity model can accurately predict the low-viscosity process window of the system RTM with L-BMI process parameters provide a theoretical basis.