中国塑料 ›› 2021, Vol. 35 ›› Issue (11): 64-70.DOI: 10.19491/j.issn.1001-9278.2021.11.010

• 材料与性能 • 上一篇    下一篇

吸湿行为对PMI泡沫性能及应用的影响

曾泽群, 吴锦裕, 向辉, 刘巍杰, 尹君()   

  1. 浩博(福建)新材料科技有限公司,福建 晋江 362200
  • 收稿日期:2021-04-10 出版日期:2021-11-26 发布日期:2021-11-23

Effect of Hygroscopic Behavior on Properties and Applications of PMI Foam

ZENG Zequn, WU Jinyu, XIANG Hui, LIU Weijie, YIN Jun()   

  1. Haobo(Fujian)New Materials Technology Co,Ltd,Jinjiang 362200,China
  • Received:2021-04-10 Online:2021-11-26 Published:2021-11-23
  • Contact: YIN Jun E-mail:yinjunjlu@aliyun.com

摘要:

研究了在不同条件处理下,聚甲基丙烯酰亚胺(PMI)泡沫的密度、孔径和厚度对其吸湿行为的影响,并实验验证PMI泡沫吸湿后对其力学性能、烘干可逆性及粘接性能的影响。结果表明,PMI泡沫密度越大,吸湿速率越小;孔径越大,吸湿速率越大;厚度越大,吸湿速率越小,饱和吸湿率越低;吸湿后,PMI泡沫刚性下降,韧性增强,粘接时易出现缺陷;在短期的高湿环境或浸水下,PMI泡沫性能烘干可逆,长期在高湿环境或浸水条件下处理后,PMI泡沫性能出现不可逆下降。

关键词: 聚甲基丙烯酰亚胺, 泡沫, 吸湿, 力学性能, 粘接

Abstract:

The effects of density, pore size and thickness of PMI foam on its hygroscopic behavior under different conditions were studied, and the effect of hygroscopicity on its mechanical properties, drying reversibility and adhesive performance were evaluated. The results indicated that an increase in the density of PMI foam led to a decrease in the rate of moisture absorption, whereas the pore size presented an opposite variation trend. The rise of thickness reduced not only the rate of moisture absorption but also the saturated moisture absorptivity. The PMI foam exhibits a decrease in rigidity and an increase in toughness after moisture absorption, which caused defects more easily during adhesion. In the short period of time for high humidity or immersion, the PMI foam shows reversible performance. After a long period of treatment, the performance of PMI foam decreased irreversibly.

Key words: polymethacrylimide, foam, moisture absorption, mechanical property, adhesion

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