RTM 用R801 树脂工艺及性能

对一种新型RTM用双马来酰亚胺树脂R801的固化反应特性、成型工艺及其制备的复合材料性能进行了研究,DSC曲线表明该树脂体系的固化温度为170～220℃;黏度随温度变化曲线表明在70～120℃,树脂黏度增长缓慢,具有不少于7 h的适用期;在90℃左右时,其初始黏度<100 mPa.s,工艺操作窗口时间≥10 h;该树脂制备的MT300碳纤维复合材料在300℃时的压缩、弯曲、层剪性能保持率均≥63%。

Processing and Properties of R801 Resin for RTM

Curing behavior and processing of a novel BMI resin(R801) for RTM were investigated.The mechanical properties.Carbon fiber reinforced BMI composites were also studied.DSC results indicated that the curing temperature of this resin ranged from 170℃ to 220℃.There is a low viscosity platform longer than 7 hours due to the soft rise of the resin’s viscosity from 70 to 120℃ the viscosity-to-temperature curves.Sufficient processing time longer than 10 hours is possible with the initial viscosity below 100 mPa·s at the temperature about 90℃.According to the testing mechanical properties,excellent heat-resistant property could also be obtained for the composites using it as the matrix,and mechanical properties retention is above 63% when tested at 300℃.