双马来酰亚胺/聚醚砜复相树脂相结构与热性能  

Phase structure and thermal properties of bismaleimide/polyethersulfone multi-phase resin system

作　　者：董慧民 安学锋 闫丽 钱黄海 程丽君 刘丽萍 李跃腾 DONG Huimin;AN Xuefeng;YAN Li;QIAN Huanghai;CHENG Lijun;LIU Liping;LI Yueteng(Aviation Key Laboratory of Science and Technology on Materials and Application Research for Vibration and Noise Reduction,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;AVIC Composite Corporation Ltd.,Beijing 101300,China)

机构地区：[1]中国航发北京航空材料研究院减振降噪材料及应用技术航空科技重点实验室,北京100095 [2]中国航发北京航空材料研究院先进复合材料国防科技重点实验室,北京100095 [3]中航复合材料有限责任公司,北京101300

出　　处：《航空材料学报》2019年第3期81-87,共7页Journal of Aeronautical Materials

摘　　要：利用SEM、DMA和TGA研究双马来酰亚胺(BMI)/聚醚砜(PES)复相树脂微观相结构对热性能的影响。结果显示:BMI/PES复相树脂体系发生了相分离现象,当PES添加量达到15phr时,复相树脂体系中产生了相反转结构,富BMI颗粒相被富PES相紧密包裹;相比于纯BMI树脂,BMI/PES复相树脂中归属于富BMI相的玻璃化转变温度Tg升高;BMI/PES-5复相树脂中只有一个Tg,其起始模量降低对应的温度升高;随着PES添加量增大,BMI/PES复相树脂高温塑性行为更加明显;由于PES与BMI间良好的界面作用及富PES相的热防护作用,BMI/PES复相树脂的最大热失重温度和残炭率均得到显著增大;树脂体系在氮气氛围中的耐热性要优于空气氛围。The effect of micro phase morphology of bismaleimide (BMI)/polyethersulfone (PES) multi-phase system on the thermal properties was studied by SEM, DMA and TGA. The SEM results suggest that the phase separation exists in the multi-phase BMI/PES resin. Phase inversion happens with the addition of PES up to 15 phr. SEM shows that the subtle micro structure with fine BMI-rich particulate phases is surrounded by continuous PES-rich phase. The glass transition temperature (Tg) belonging to BMI- rich phase of BMI/PES resin is higher than neat BMI resin. BMI/PES-5 resin system exhibits only one Tg and the temperature corresponding to the decrease of initial modulus increased. The high-temperature plastic behavior of BMI/PES resin system is enhanced with the increase of PES. The peak thermal decomposition temperature and char yield of BMI/PES resin are enhanced owing to the excellent interface interaction between BMI and PES as well as the thermal protection effect of PES. The heat resistance of resin systems under N2 atmosphere are superior to the systems under air atmosphere.

关 键 词：聚醚砜(PES) 双马来酰亚胺(BMI) 相结构 玻璃化转变 动态机械热分析(DMA) 热失重分析(TGA) 

分 类 号：TQ322[化学工程—合成树脂塑料工业]