RTM用酚醛树脂热化学行为及其复合材料性能研究  

THERMO-CHEMICAL BEHAVIOR OF PHENOLIC RESIN FOR RTM AND ITS COMPOSITES

作　　者：李婷[1] 刘建军[1] 杨学军[1] 赵文斌[1] 

机构地区：[1]西安航天复合材料研究所,西安710025

出　　处：《玻璃钢／复合材料》2015年第5期89-92,共4页Fiber Reinforced Plastics/Composites

摘　　要：研究了一种适用于RTM成型工艺用酚醛树脂的DSC、TG、Tg和粘温特性等热化学行为,在分析其工艺适应性的基础上制备了碳纤维针刺预制体RTM成型复合材料,对复合材料的力学性能、热物理性能及烧蚀性能进行了测试。结果表明,复合材料层间剪切强度为32.4MPa,200℃的比热容为1530J/（kg·K）,25~200℃线膨胀系数为-0.234×10-6/℃,线烧蚀率为0.069mm/s,质量烧蚀率为0.0926g/s,表现出了作为热防护材料的良好特性。Thermal chemical behavior of a kind of phenolic resin for RTM process was studied, such as DSC, TG, Tg and viscosity-temperature characteristics. Based on the analysis of the process adaptability, carbon fiber needling preform reinforced the phenolic resin composites was made by RTM. Then the mechanical, thermal physical and ablative properties of the composites were tested and evaluated. Experimental results show that the in- terlayer shear strength of the composites is 32.4MPa, heat capacity of 200~C is 1530J/（ kg-K）, linear expansion coefficient of 25 ~ 200℃ is -0. 234x 10-6/℃, linear ablation rate is 0. 069mm/s, quality ablation rate is 0. 0926g/ s. It shows good characteristics of thermal protection.

关 键 词：RTM工艺 酚醛树脂 复合材料 热性能 烧蚀性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ323.1[化学工程—合成树脂塑料工业]