联苯聚芳醚酮-双马来酰亚胺复合树脂的分相行为和流变行为  

Phase separation and rheological behavior of a new biphenyl poly(aryl-ether-ketone)-bismaleimide composite resin

作　　者：胡晓兰[1] 严建龙 余荣禄[1] 周玉敬 李伟东 刘刚 益小苏 HU Xiaolan;YAN Jianlong;YU Ronglu;ZHOU Yujing;LI Weidong;LIU Gang;YI Xiaosu(College of Materials,Xiamen University,Xiamen 361005,China;National Key Laboratory of Advanced Composites,AVIC Composite Technology Center,AVIC Composite Corporation LTD.,Beijing 101300,China;Center for Advanced Low-dimension Materials,Donghua University,Shanghai 201620,China;State Key Laboratory of Advanced Forming Technology&Equipment,Beijing Jike Guochuang Lightweight Science Research Institute CO.LTD.,Beijing 100083,China)

机构地区：[1]厦门大学材料学院,厦门361005 [2]中航复合材料有限责任公司先进复合材料重点实验室,航空工业复合材料技术中心,北京101300 [3]东华大学先进低维材料中心,上海201620 [4]北京机科国创轻量化科学研究院有限公司先进成型技术与装备国家重点实验室,北京100083

出　　处：《复合材料学报》2021年第8期2568-2577,共10页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(21774104,21975210);国防基础科研计划(JCKY2017205C016)。

摘　　要：离位复合增韧技术是本征脆性的热固性树脂基纤维复合材料提高韧性的有效解决方案,为了更好地结合离位增韧技术和树脂传递模塑(RTM)工艺制备高性能双马来酰亚胺(BMI)树脂基复合材料,本文面向新型热塑性联苯聚芳醚酮(PAEK-B),研究了PAEK-B在BMI树脂及碳纤维复合材料中的分相行为及PAEKB/BMI复合树脂的流变特性。结果表明,PAEK-B在BMI树脂的注射窗口温度保持一定时间后会发生分相行为,并在RTM工艺制备的碳纤维(CF)/PAEK-B/BMI复合材料中保持了分相结构。BMI树脂的注射温度会影响到PAEK-B在其中的溶解特性,注射温度升高会使BMI树脂的初始黏度变小,但PAEK-B/BMI复合树脂的黏度拐点时间会缩短;PAEK-B/BMI复合树脂符合Winter-Chambon准则,复合树脂的tanδ对频率没有依赖性,且复合树脂的凝胶活化能随着PAEK-B含量的增加逐渐增大。Ex-situ toughening technology is a good solution to improve the toughness of intrinsically brittle thermosetting resin matrix fiber composites. In order to better combine the ex-situ toughening technology with resin transfer molding(RTM) process to prepare high performance bismaleimide(BMI) resin matrix composites,in this paper,based on a new thermoplastic biphenyl polyether ketone(PAEK-B) resin,the phase separation behavior of the PAEK-B in BMI resin and carbon fiber composites,and the rheological properties of PAEK-B/BMI composite resin were studied. The results show that the phase separation behavior of PAEK-B occurs in the injection window temperature of BMI resin for a certain time,and the phase separation structure is maintained in the carbon fiber(CF)/PAEK-B/BMI composites prepared by RTM process. The solution of PAEK-B in the BMI resin is affected by the injection temperature of BMI resin. The initial viscosity of the BMI resin decreases with the increase of injection temperature,but the inflection point time of the PAEK-B/BMI composite resin decreases;The PAEK-B/BMI composite resin accords with the Winter-Chambon criterion. The tanδ of the composite resin has no dependence on the frequency,and the gel activation energy of the composite resin increases with the increase of PAEK-B content.

关 键 词：离位复合增韧技术 双马来酰亚胺树脂 相分离 形貌 流变行为 树脂传递模塑(RTM) 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]