碳纤维增强双马来酰亚胺树脂复合材料耐湿热性能  

Hygrothermal Resistance Properties of Carbon Fibers Reinforced Modified Bismaleimide Composites

作　　者：易增博 殷武雄 赵宗严 江汛 艾涛[2] 李云涛[3] 聂挺 杨泽诚 

机构地区：[1]陕西天策新材料科技有限公司工程技术中心,陕西西安710100 [2]长安大学材料科学与工程学院,陕西西安710100 [3]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《塑料工业》2017年第8期126-130,146,共6页China Plastics Industry

摘　　要：采用改性双马来酰亚胺树脂与碳纤维制备了耐热及耐湿热性能优异的复合材料。通过红外光谱分析、不同温度下力学性能测试及动态力学性能测试分析等,考察了该复合材料耐热及耐湿热性能;从吸湿特性、物理、化学特性及热应力等方面分析了湿热处理前、后复合材料高温环境下力学性能衰减机理。结果表明,复合材料吸湿初始阶段符合Fick第二定律,平衡吸湿率为0.97%~1.32%;湿热处理对复合材料基体化学结构和玻璃化转变温度基本无影响;界面处不断增大的热应力削弱界面结合强度,这是高温环境下力学性能下降的关键因素;与国内外同类复合材料相比,该复合材料湿热处理前、后在高温下弯曲性能和层间剪切强度保持率较高,耐热及耐湿热性能出众。A kind of composites with outstanding heat was prepared by adopting modified bismaleimide （BMI） resistance and hygrothermal resistance properties resin and carbon fibers in this paper. Heat resistance and hygrothermal properties of the composites were investigated through FTIR spectra, mechanical test under different temperatures and dynamic mechanical test. Furthermore, the degradation principle of the untreated and hydrothermal treatment composites was studied from the aspects of moisture absorption properties, physics and chemical properties, thermal stress and so on. The results indicate that moisture absorption change of the composites conforms with the FICK＇s second law at the initial stage of hygrothermal treatment. The balance moisture rate is between 0. 97% and 1.32%. Hygrothermal treatment has little effect on the chemical structure of the composites＇matrix and glass transition temperature. The increasing thermal stress at the interface weakens the interfacial bonding strength, which is the key factor to decrease the mechanical properties in high temperature environment. Compared with the same kind of composites at home and aboard, the composites shows excellent heat resistance and hygrothermal resistance properties, with higher retention rate of flexural properties and interlaminar shear strength （ILSS） before and after moisture absorption under high temperature.

关 键 词：碳纤维 改性双马树脂 湿热处理 保持率 耐湿热 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业]