天然橡胶分子链侧链结构的表征

材料研究学报, 2017, 31(5): 369-373. doi: 10.11901/1005.3093.2016.631

天然橡胶分子链侧链结构的表征

1.海南大学材料与化工学院热带岛屿资源先进材料教育部重点实验室海口570228

2.海南大学材料与化工学院热带岛屿资源先进材料教育部重点实验室海口570228

3.海南大学材料与化工学院热带岛屿资源先进材料教育部重点实验室海口570228

4.海南大学材料与化工学院热带岛屿资源先进材料教育部重点实验室海口570228

基金项目: 国家自然科学基金(51363006) Science and Technology Program of Hainan(ZDKJ2016020-02) Special Fund for Agro-scientific Research in the Public Interest(20140366) 公益性行业(农业)科研专项经费项目(20140366) National Natural Science Foundation of China(51363006) 海南省重大科技计划(ZDKJ2016020-02)

关键词：有机高分子材料 , 天然橡胶 , 分子链 , 支链结构 , 分析

Structural Characterization of Natural Rubber Molecular Side Chain

Keywords： orgamic polymer materials , natural rubber , molecular chain , branch structure , analysis

使用氮标记法以及凝胶渗透色谱仪、凯氏定氮仪、傅里叶红外光谱仪、核磁共振波谱仪等手段,分析和表征了天然橡胶分子链侧链中环氧基、醛基、羧基、羟基和分子链中的3,4-聚合结构.结果表明:在天然橡胶分子链侧链中,环氧基含量为0.63％,羟基含量为0.04％,醛基含量为0.11％,羧基含量为0.01％.根据上述结果,构建了天然橡胶分子链侧的链结构模型.

The branch Side-chains of the natural rubber molecular chain are investigated in this thesis.The instruments such as by means of Gel Permeation Chromatograph (GPC),Kjeldahl Auto Analyzer,Fourier Transform Infrared Spectrometer(FTIR) and Nuclear Magnetic Resonance(NMR) Spectrometer etc.in terms of the epoxide group,hydroxyl,aldehyde group,and carboxyl group,as well as the 3,4-polymeric structures of the chain are used to detect the variety and content of branch.The experimental results show that the contents of epoxide group is 0.63％,hydroxyl is 0.04％,aldehyde groups is 0.11％,carboxyl groups is 0.01％.Based on these results,a model of molecular chain has been built is established for the natural rubbe.

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