中国塑料2025，Vol.39Issue(11)：7-12,6.DOI:10.19491/j.issn.1001-9278.2025.11.002
真空辅助发泡制备硬质低密度开孔聚酰亚胺泡沫的结构与性能
Structure and properties of rigid low-density open-cell polyimide foam prepared by vacuum-assisted foaming
解明东 1秦柳 2司道星 1刘家鑫 3杨卫民1
作者信息
- 1. 北京化工大学机电工程学院,北京 100029
- 2. 宁波格林美孚新材料科技有限公司,宁波 315300
- 3. 中国航天科技创新研究院,北京 100088
- 折叠
摘要
Abstract
Rigid open-cell polyimide(PI)foam was synthesized from a precursor based on 3,3',4,4'-oxydiphthalic anhy-dride and 4,4'-oxydianiline.The precursor was first foamed under a vacuum atmosphere and subsequently heated to 350℃in air to complete imidization.The chemical structure,thermal properties,microstructure,and mechanical perfor-mance of both the precursor and the final foam were comprehensively characterized using nuclear magnetic resonance,Fourier transform infrared spectroscopy,differential scanning calorimetry,thermogravimetric analysis,mercury intrusion porosimetry,scanning electron microscopy,and mechanical testing.The foaming process was also investigated.The re-sults indicated that the foam was fully imidized and exhibited a density ranging from 45 to 57 kg/m3,an open porosity of 95.32%,and a specific surface area of 7.267 m2/g.The pore size distribution was predominantly between 20 and 200 μm,and the microstructure presented a three-dimensional sheet-like network where the sheets were mutually adher-ent.The foam demonstrated a compressive stress at 10%strain of 16.19 kPa and maximum bending strength of 300.73 kPa.These properties are comparable to those of other polyimide foams of the same type.关键词
聚酰亚胺/开孔泡沫/真空发泡Key words
polyimide/open-cell foam/vacuum foaming分类
化学化工引用本文复制引用
解明东,秦柳,司道星,刘家鑫,杨卫民..真空辅助发泡制备硬质低密度开孔聚酰亚胺泡沫的结构与性能[J].中国塑料,2025,39(11):7-12,6.
