The Structure and Property of Rigid Closed-Cell Polyimide Foams

Shu-shu LI; Ai-jun HU; Shi-yong YANG

doi:10.14028/j.cnki.1003-3726.2014.12.013

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The Structure and Property of Rigid Closed-Cell Polyimide Foams

更新时间：2022-09-18

- The Structure and Property of Rigid Closed-Cell Polyimide Foams
- Polymer Bulletin Vol. 27, Issue 12, Pages: 124-129(2014)
- 作者机构：
  
  中国科学院化学研究所高技术材料实验室，北京　100190
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2014.12.013
  CLC：
- Published：2014-12，
  
  Received：16 October 2014，
  
  Revised：05 November 2014，
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Shu-shu LI, Ai-jun HU, Shi-yong YANG. The Structure and Property of Rigid Closed-Cell Polyimide Foams. [J]. Polymer Bulletin 27(12):124-129(2014)
DOI：

Shu-shu LI, Ai-jun HU, Shi-yong YANG. The Structure and Property of Rigid Closed-Cell Polyimide Foams. [J]. Polymer Bulletin 27(12):124-129(2014) DOI： 10.14028/j.cnki.1003-3726.2014.12.013.

摘要

通过调控聚酰亚胺(PI)树脂主链结构中二苯羰基链段与不对称联苯链段的含量比例，制备了具有不同羰基含量的PI前驱体同体树脂。这些前驱体树脂都具有良好的熔融性，当加热至320~330℃时，PI树脂完全熔融形成低粘度熔体树脂；进一步提高加热温度时树脂熔体粘度由于发牛交联反应而急剧增大。将前驱体树脂经加热发泡形成的热固性硬质闭孔PI泡沫具有很高的闭孔率(

86%)和耐热性能（

353℃ ，

519℃）。研究发现，在PI树脂主链结构中引入二苯甲酮链段可明显提高PI泡沫的韧性，而不会牺牲其力学强度和模量。

Abstract

Through regulating the content and proportion of biphenyl carbonyl and unsymmetrical biphenyl segments in polyimide resin backbone

polyimide precursor solid resins with different carbonyl content were prepared. These precursor resins have good meltability

when heated to 320~330℃

PI resin completely melted

resulting in low melt viscosity resin

as the temperature increased further

the melt viscosity increases rapidly due to the crosslinking reaction. The precursor resins were heated and foamed

forming the thermosetting rigid closed-cell PI foams which have high closed-cell rate (

86%) and high thermal properties (

353℃

519℃) . The study found that the introduction of the biphenyl carbonyl segment into the PI resin main chain could obviously improve the PI foam toughness without sacrificing its mechanical strength and modulus.

关键词

聚酰亚胺硬质闭孔结构泡沫共聚反应耐热性能力学性能

Keywords

PolyimideRigid closed-cell foamsCopolymerizationHeat resistanceMechanical property

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Related Institution

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