聚甲基丙烯酰亚胺树脂的分子结构研究

玻璃钢/复合材料 ›› 2017, Vol. 0 ›› Issue (11): 32-36.

聚甲基丙烯酰亚胺树脂的分子结构研究

李小川¹,李克迪²,孟佳丽²,胡爱军^1*

1.中国科学院化学研究所,北京110190;
2.浙江中科恒泰新材料科技有限公司,绍兴312369

收稿日期:2017-06-09 出版日期:2017-11-28 发布日期:2017-11-28
通讯作者: 胡爱军(1966-),硕士,高级工程师,主要研究方向为聚酰亚胺材料,aijunhu@iccas.ac.cn。
作者简介:李小川(1988-),硕士,主要研究方向为聚酰亚胺材料。
基金资助:
863计划项目(2015AA033902)

STUDY ON MOLECULAR STRUCTURE OF POLYMETHACRYLIMIDE FOAM

LI Xiao-chuan¹, LI Ke-di², MENG Jia-li ², HU Ai-jun^1*

1.Institue of Chemistry, Chinese Academy of Sciences, Beijing 110190, China;
2.Cashem Advanced Materials Hi-tech Co., Ltd., Shaoxing 312369, China

Received:2017-06-09 Online:2017-11-28 Published:2017-11-28

摘要/Abstract

摘要： 以聚甲基丙烯酰亚胺(PMI)泡沫分子结构为研究对象,通过对其原位加热的傅里叶变换红外(FR-IR)分析,发现样品Cascell IH型PMI泡沫预聚物在160 ℃/2 h处理条件下,-COOH与-CN基团就开始发生亚胺化反应;200 ℃/2 h处理后,-NH伸缩振动的峰型和峰面积不再发生改变,-C=N伸缩振动峰出现;通过碳核磁谱图分析发现,Cascell IH泡沫预聚物不存在相邻的-COOH;结果说明Cascell IH泡沫预聚物经过高温处理后只会发生成环的亚胺化反应和形成梯形的环化反应。通过激光光散射(LLS)和凝胶渗透色谱仪(GPC)测定Cascell IH分子量与分布,结果显示都出现双峰,表明Cascell IH泡沫预聚物的分子量较大且分布较宽,符合自由基共聚合的特点。

关键词: 聚甲基丙烯酰亚胺, 红外, 激光光散射, GPC凝胶色谱, 核磁

Abstract: In this paper, the molecular structure of polymethacrylimide (PMI) was studied. Based on the Fourier transform infrared (FR-IR) analysis in situ heating, it was found that the Casecell IH PMI foam prepolymer began the reaction of -COOH and -CN groups turning hexahydric imide ring in the condition of 160 ℃/2 h. The -NH stretching vibration peak type and area were no longer changed, and -C=N stretching vibration peak appeared after treatment at 200 ℃/2 h. The results of ¹³C NMR showed that the adjacent -COOH groups were not included in Casecell IH PMI prepolymer. PMI foam prepolymer only underwent ring formation of the imidization reaction and trapezoidal reaction at high temperature. The molecular weight and distribution of Casecell IH were measured by laser light scattering (LLS) and gel permeation chromatography (GPC). The results showed that the weight average molecular weight appeared double peaks, indicating that the molecular weight of Casecell IH perpolymer was larger and the distribution wide, consistent with the characteristics of free radical copolymerization.

Key words: polymethacrylimide, infrared spectroscopy (IR), laser light scattering (LLS), gel permeation chromatography (GPC), nuclear magnetic resonance (NMR)

中图分类号:

TB332

李小川,李克迪,孟佳丽,胡爱军. 聚甲基丙烯酰亚胺树脂的分子结构研究[J]. 玻璃钢/复合材料, 2017, 0(11): 32-36.

LI Xiao-chuan, LI Ke-di, MENG Jia-li , HU Ai-jun. STUDY ON MOLECULAR STRUCTURE OF POLYMETHACRYLIMIDE FOAM[J]. Fiber Reinforced Plastics/Composites, 2017, 0(11): 32-36.

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