中国塑料 ›› 2022, Vol. 36 ›› Issue (10): 7-14.DOI: 10.19491/j.issn.1001-9278.2022.10.002

• 材料与性能 • 上一篇    下一篇

可常温发泡的轻质高强环氧树脂泡沫的制备及性能研究

杨金1(), 陈鹏然2, 高培鑫2   

  1. 1.广东航科新材料有限公司,广东 清远 511500
    2.华南理工大学材料科学与工程学院,广州 510000
  • 收稿日期:2022-05-18 出版日期:2022-10-26 发布日期:2022-10-27
  • 作者简介:杨金(1982-),男,博士,高级工程师,从事聚合物复合材料的创新设计、成型和应用领域研究,470325362@qq.com

Preparation and properties of lightweight and high⁃strength epoxy resin foams foamed at room temperature

YANG Jin1(), CHEN Pengran2, GAO Peixin2   

  1. 1.Guangdong Hangke New Materials Co,Ltd,Qingyuan 511500,China
    2.School of Materials Science and Engineering,South China University of Technology,Guangzhou 510000,China
  • Received:2022-05-18 Online:2022-10-26 Published:2022-10-27

摘要:

以环氧树脂E⁃44作为基体树脂、聚甲基氢硅氧烷(PHMS)为发泡剂、N⁃氨乙基哌嗪(N⁃AEP)为固化剂,采用常温发泡工艺,制备具有良好力学性能及泡孔结构的环氧树脂泡沫,研究各配方组分以及发泡方式对泡沫发泡行为以及压缩性能的影响。结果表明,PMHS含量对泡沫发泡行为有重要影响,需要严格控制,含量超过3 %会较大幅度增大泡孔直径,降低泡孔密度,恶化泡孔结构。同时纳米二氧化硅、甜菜碱(CAB⁃35)以及聚硅氧烷⁃聚氧化烯烃共聚物(DH212)等组分对泡沫的泡孔结构和力学强度都有比较大的影响。

关键词: 环氧树脂, 常温发泡, 压缩性能, 泡孔结构

Abstract:

A type of lightweight and high⁃strength epoxy resin foams was prepared through the foaming process at normal temperature using E⁃44 epoxy resin as a matrix, polymethylsiloxane (PHMS) as a foaming agent, and N⁃N⁃ethyl piperazine as a curing agent. The effects of formula components and foaming methods on the foaming behavior and compressive properties of the epoxy resin foams were studied. The results indicated that the PMHS content influenced the foaming behavior of the foams significantly, and therefore, there was a requirement for controlling its content strictly. The foams showed a remarkable increase in cell diameter but a decrease in cell density with the addition of 3 % PMHS, leading to the deterioration of cell structure. Moreover, the incorporation of nano silica, beet (CAB⁃35), and poly(siloxane⁃co⁃oxyolefin) copolymer (DH212) also influenced the cellular structure and mechanical strength of the foams greatly.

Key words: epoxy resin, room?temperature foaming, compressibility, cell structure

中图分类号: