RTM 用耐高温R802 树脂工艺及性能

研究了RTM用耐高温R802邻苯二甲腈树脂黏度随温度、时间的变化,不同升温速率下的DSC特性,常、高温复合材料弯曲、层间剪切强度、树脂与纤维的界面等。黏度随时间变化曲线表明,其140℃下RTM工艺窗口不少于180 min;DSC曲线表明,在180℃时开始凝胶,固化温度203℃,后处理温度256℃;力学性能测试结果表明,R802/MT300复合材料200℃下弯曲强度保持率为103.8%,500℃下弯曲强度保持率为41.1%,300℃下层间剪切强度较常温提高18%,500℃下层间剪切强度保持率为44%,其树脂与纤维结合良好。

Properties of A High-Temperature Resistant Resin R802 for RTM Process

A high-temperature resistant phthalonitrile resin R802 for RTM process was introduced in this paper.Its viscosity dependence on temperatures and time,DSC data under different heating rates,flexural strength,shearing strength and interface between the fiber and resin are investigated.According to the viscosity-to-times results,sufficient processing time is possible become there is a low viscosity platform longer than 180 minutes at 140℃.DSC results indicated the resin began to gel at 180℃,to cure at 203℃ and to handle for better properties at 256℃.From the mechanical properties results,there was an obvious advancement of about 3.8% higher of R802/MT300 flexural strength tested at 200℃ and 18% higher of shearing properties tested at 300℃ compared to the results at room temperature.The flexural properties could maintain 41.1% and strength retention of shearing properties is up to 44% at 500℃.There is an excellent interface between fiber and resin of R802/MT300 composites.