适用于RTM成型的新型耐烧蚀苯并噁嗪树脂的研究  

Novel Ablative Resins Based on Benzoxazine for RTM Processing

作　　者：田巧[1] 赵锦成[1] 朱蓉琪[1] 盛兆碧[1] 顾宜[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,成都610065

出　　处：《宇航材料工艺》2006年第5期27-29,33,共4页Aerospace Materials & Technology

基　　金：国家自然科学基金资助(90405001)

摘　　要：在低黏度的双环苯并噁嗪中间体(B-BOZ)中加入一种新型的多官能基单环苯并噁嗪(AS-BOZ)或一种交联剂(TPA),复配制得了一种适用于RTM成型的新型耐烧蚀苯并噁嗪树脂,对树脂体系的黏度及固化物的热稳定性、力学性能、残碳率及碳的形貌进行了研究。结果表明,无论是AS-BOZ还是TPA的引入都使得双环苯并噁嗪体系黏度降低,同时提高体系的交联密度,使固化物的Tg和残碳率都大幅度提高。其中BA2-1固化物的Tg为250℃,800℃下氮气中残碳率为68%,质量烧蚀率为23.3 mg/s;BT2-1固化物的Tg为240℃,800℃下氮气中残碳率为70%,质量烧蚀率为20.1 mg/s,两体系高温下均能得到致密的碳层结构。New Benzoxazine blends composed of a low viscosity bis-benzoxazine （ B - BOZ） and a novel mono benzoxazine with a polymerizable functional group （AS - BOZ） or a cross-linking agent （TPA） are prepared. The viscosities of these blends and the thermal stability, mechanical properties, char yield of the cured samples as well as the morphological appearance of char are investigated. The results show that, by adding either AS - BOZ or TPA, the viscosities of B - BOZ resin blends are reduced greatly, but the glass transition temperature （ Ts ） and the char yield are highly improved via the crosslinking reaction of the polymerizable groups. The cured sample （ B - BOZ： AS - BOZ = 2： 1mole ratio） BA2 -1 has Ts of 250℃ ,char yield of 68% at 800℃ in N2 ,mass ablation rate of 23.3 mg/ s, while the cured sample BT2 - 1 （ B - BOZ： TPA = 2： 1 ） has Ts of 240℃, char yield of 70% at 800℃ in N2, mass ablation rate of 20.1 mg/s. Both BA - BOZ and BT - BOZ resins can form compact carbide at high temperature,

关 键 词：树脂传递模塑 烧蚀树脂 苯并噁嗪 残碳率 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]