Preparation of Thermosetting/Thermoplastic Polyimide Foam with Pleated Cellular Structure via In Situ Simultaneous Orthogonal Polymerization

被引：31

作者：

Ou, Anping ^{[1
]}

Huang, Zheng ^{[1
]}

Qin, Rui ^{[1
]}

Chen, Xianchun ^{[2
]}

Li, Yulong ^{[1
]}

Liu, Yang ^{[1
]}

Liu, Xiangyang ^{[1
]}

Wang, Xu ^{[1
,3
]}

机构：

[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat & Engn, Chengdu 610065, Sichuan, Peoples R China

[2] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610065, Sichuan, Peoples R China

[3] Tech Univ Dresden, Dept Chem & Food Chem, Ctr Adv Elect Dresden, D-01062 Dresden, Germany

来源：

ACS APPLIED POLYMER MATERIALS | 2019年 / 1卷 / 09期

基金：

中国国家自然科学基金;

关键词：

polyimide foam; simultaneous polymerization; pleated structure; thermal insulation; high temperature; PHASE-TRANSITION BEHAVIOR; THERMAL-INSULATION; HIGH-PERFORMANCE; AEROGELS; POLYAMIDES; SEPARATION; STABILITY; SILICA;

D O I：

10.1021/acsapm.9b00558

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Miscible thermosetting/thermoplastic aromatic polyimide foam is prepared by in situ simultaneous orthogonal polymerizations, where the linear polyimide (PI) is formed by condensation polymerization from polyester ammonium salt (PEAS) and the cross-linked bismaleimide (BMI) is synthesized through addition polymerization from 4,4'-bismaleimide diphenylmethane (BDM). A unique pleated cellular structure is formed after the polyblend foam is cured at high temperature; here, 2D FT-IR correlation analysis is employed to detect the detailed chemical reactions during the thermal foaming progress. The simultaneous orthogonal polymerization is confirmed, and the cross-linking reaction of BDM is found to be divided into two stages. The pleated structure formed in the second stage significantly improves the thermal insulation property of the polyblend foam-the effective thermal conductivity decreases from 427.5 to 77.S mW.m(-1).K-1 at 300 degrees C with 15 wt % BMI. Meanwhile, the polyblend is miscible and foams only have one single glass transition temperature (Tg), which BMI. This polyblend polyimide foam will be a promising porous material for thermal insulation applications in extreme environments, and the method to prepare the pleated cellular structure in this work should provide a strategy to develop advanced polymeric foam materials.

引用

页码：2430 / 2440

页数：21

共 51 条

[1] Development of high void fraction polylactide composite foams using injection molding: Mechanical and thermal insulation properties [J].