c构联苯结构的聚酰亚胺树脂及复合材料.pdfVIP

1oC 耐37 PMR型含异构联苯结构的 聚酰亚胺树脂及复合材料 曲希明1 冀棉1 赵伟栋2 范琳1 杨士勇1 (1 中国科学院化学研究所高技术材料实验室，北京100190) (2航天材料及工艺研究所，北京100076) 文摘采用活性单体原位聚合方法，由2，3，3．47一联苯四甲酸二乙酯为芳香族二酸二酯、对苯二胺与间 苯二胺混合物为芳香族二胺、降冰片稀二甲酸单乙酯为反应性封端剂制备了系列PMR型聚酰亚胺树脂。研究 了树脂的化学结构及其计算分子量等对其成型工艺性能和耐热性能的影响规律。以优选树脂体系为基体与碳 纤维复合制备的碳纤维增强聚酰亚胺树脂基复合材料表现出优良的耐热性能与力学性能，室温下，弯曲强度为 l 560 MPa，弯曲模量为137GPa，层间剪切强度为56MPa，在3700C的高温下，其力学性能保持率大于50％。 关键词PMR型聚酰亚胺树脂，成型工艺性能，力学性能，热稳定性 PMR ResinsWith Chain Polyimide AsymmetricBiphenylimide for371oC Segments Application JiMianlZhao FanLinl QuXimin91 Weidon92 YangShiyon91 ofAdvanced of of (1 Materials，InstituteChemistry，ChineseAcademySciences，Beijing100190) Laboratory Polymer ResearchInstituteof (2Aerospace Materials＆ProcessingTechnology，Beijing100076) AbstractPMR with chain were polyimidesasymmetricbiphenylimidesegmentspreparedbyusingdiethylester of mixtureof and 2，3，3’，4’biphenyltetracarboxylicdianhydride，thep-phenylenediamine as as of well of acid thecalculatedmolecu- 5一norbornene-2．3-dicarboxylicagent．Influence monoethylester endcaping itsmelt thermal was lar anddiaminemixture oftheresinon and weights compositions processabilitypropertyinvestiga— carbonfiber—reinforced exhibitedmechanical atroom ted．The polyimidecompositeprepared good p