文献类型：期刊文献

英文题名：Fabrication of rigid polyimide foams via thermal foaming of nadimide-end-capped polyester-amine precursor

作者：Li, Jianwei[1];Yu, Ni[2];Jing, Zhanxin[3];He, Xinhai[1];Shi, Xuetao[2];Zhang, Guangcheng[2]

机构：[1]Xian Polytech Univ, Coll Mat Sci & Engn, Xian 710048, Peoples R China;[2]Northwestern Polytech Univ, Sch Sci, Key Lab Appl Phys & Chem Space, Minist Educ, Xian 710072, Peoples R China;[3]Guangdong Ocean Univ, Coll Chem & Environm, Zhanjiang 524088, Peoples R China

年份：2020

卷号：77

期号：11

起止页码：5899

外文期刊名：POLYMER BULLETIN

收录：SCI-EXPANDED(收录号：WOS:000575635200001)、、EI(收录号：20195107852931)、Scopus(收录号：2-s2.0-85076344466)、WOS

基金：This study was supported by the Research Starting Foundation of Xi'an Polytechnic University (Program No. 107020414) and Innovation and Entrepreneurship Foundation of XPU (Program No. 201909).

语种：英文

外文关键词：Polyimide foam; Cross-linked; Thermal foaming; Density; Mechanical property

外文摘要：This work provides a method for fabricating rigid polyimide foams via thermal foaming method of nadimide-end-capped polyester-amine oligomer (NPEAO) precursor particles, which were synthesized by reaction of benzophenone-3,3 ',4,4 '-tetracarboxylic dianhydride andcis-5-norbornene-endo-2,3-dicarboxylic anhydride (NA) with different diamines. The foaming mechanism of the rigid PI foams was systematically investigated. The experiment demonstrates that the pre-treatment of the NPEAO precursor particles and foaming temperature are two pivotal factors that determine the foaming processes. The densities of the prepared rigid PI foams are mainly in the range of 40-200 kg m(-3). Moreover, the density and morphology of the PI foams can be effectively controlled by adjusting these two factors. Besides, the obtained rigid PI foams present excellent mechanical and thermal properties, specifically, the flexural and compressive strength reaches as high as to 1.42 MPa and 0.47 MPa, respectively, with the density of 0.076 g cm(-3), which are superior to common PI foams and aerogels that of reported in the literature. Therefore, these superior mechanical and thermal properties make obtained rigid PI foams promising candidates as structural materials in the advanced manufacturing industry.