苯并噁嗪杂化树脂及其复合材料的制备与性能  

Preparation and Properties of Benzoxazine Hybrid Resins and Their Composites

作　　者：李光珠[1] 罗振华[1] 韩伟健[1] 徐彩虹[1] 赵彤[1] 

机构地区：[1]中国科学院化学研究所高技术材料实验室,北京100190

出　　处：《宇航材料工艺》2014年第1期75-78,共4页Aerospace Materials & Technology

基　　金：国家科学基金(50903086;21104090)

摘　　要：为提高苯并嗯嗪（BZ）的热稳定性，通过BZ与聚硅氮烷制备了一种苯并嗯嗪杂化树脂（BZ-H），并采用模压工艺制备了玻璃布／BZ-H复合材料。制备的BZ-H树脂在70-170℃有较低的黏度和聚合温度、较少的放热量及良好的固化工艺性。其固化物的t为354．7℃。在N2气氛下，尤为460℃，900℃的残重（W900℃）为75．68％。在空气气氛下，虻为466℃，W900℃为16．39％。玻璃布／BZ-H复合材料在室温下的弯曲强度、模量和层间剪切强度分别为433MPa、22GPa和24MPa，在350℃下的保留率分别为40％、68％和54％。SEM微观形貌观察表明，BZ-H树脂与纤维间具有良好的粘接作用，该特征赋予了复合材料优良的力学性能。A benzoxazine hybrid resin（BZ-H） was prepared by thermal prepolymerization between benzoxazine （BZ） and polysilazane to enhance thermal stability of benzoxazine resin, and glass fiber cloth/hybrid resin composite was also obtained by molding process. The resin shows a low viseosity between 70℃ to 170℃, indicating that the res- in possesses suitable viseosity to fabricate composites. DSC results show the hybrid resin can be eured at lower temper- ature. Dynamic mechanical analysis （DMA） shows the inflection point of tanδ is 354.7℃. In nitrogen,5 % weight loss temperature of the final cured products is 460℃, and char yield is 75.68% at 900℃. In air, 5% weight loss temper- ature of the final cured products is 466℃ ,and char yield is 16.39% at 900℃. Results of mechanical property showed that flexural strength,flexural modulus and interlaminar shear strength of the composite is 433 MPa,22 GPa and 24 MPa,respectively. At 350℃, the retention rate of flexural strength, flexural modulus and interlaminar shear strength for the composite is 40% ,68% and 54%. SEM image showed strong cohesiveness between benzoxazine and glass fi- ber.which endowed the composites excellent mechanical properties.

关 键 词：苯并噁嗪 杂化树脂 热性能 复合材料 力学性能 

分 类 号：TQ32[化学工程—合成树脂塑料工业]