2,3,3’,4’-联苯四酸二酐硬质聚酰亚胺泡沫材料的结构与性能  

Properties of 2,3,3',4'-Biphenyltetracarboxylic Dianhydride Added Rigid Polyimide Foam

作　　者：胡爱军[1] 王磊磊[1] 李姝姝[1] 李克迪 王志媛[1] 徐时彧 杨士勇[1] 

机构地区：[1]中国科学院化学研究所,北京100190 [2]浙江中科恒泰新材料科技有限公司,浙江绍兴312369 [3]浙江大学城市学院,浙江杭州310015

出　　处：《高分子材料科学与工程》2016年第9期38-44,共7页Polymer Materials Science & Engineering

基　　金：863计划项目(2015AA033902)

摘　　要：系统研究了在含2,3,3’,4’-联苯四酸二酐(a-BPDA)的聚酰亚胺(PI)泡沫材料体系中,计算相对分子质量、二胺分子结构、二酐分子结构对聚酰亚胺泡沫材料性能的影响。研究发现,对于a-BPDA/m-PDA/NA体系,计算相对分子质量为1500时,可以制备得到性能优良的硬质耐高温聚酰亚胺泡沫材料,其玻璃化转变温度高于350℃,闭孔率大于88%,压缩强度为1.34 MPa。在该体系中,部分引入ODPA,可提高材料的韧性;当n(BTDA)∶n(a-BPDA)=5∶5时,泡沫材料不但拥有高的耐热性能和力学力学性能,同时还具有良好的韧性。The influences of calculated molecular weight, different diamines and different dianhydrides on properties of 2,3,3’,4’-biphenyltetracarboxylic dianhydride （a-BPDA）-added polyimide foam were studied. The results show that a-BPDA/m-PDA/NA system can provide excellent high-temperature resistant rigid polyimide foam with a calculated molecular weight of 1500 g/mol. The foam has high glass transition temperature （〉350 ℃）, high closed-cell content （〉88%） and high compressive strength （1.34 MPa）. Moreover, partly introducing ODPA into the above system can increase foam toughness. When the mole ratio of BTDA to a-BPDA is 5∶5, the foam not only shows good mechanical and thermal performance, but also outstanding toughness.

关 键 词：关键词:聚酰亚胺泡沫 耐高温 力学性能 闭孔 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]