天然橡胶分子链侧链结构的表征

doi:10.11901/1005.3093.2016.631

材料研究学报

2017, Vol. 31

Issue (5): 369-373 DOI: 10.11901/1005.3093.2016.631

论文

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天然橡胶分子链侧链结构的表征

金林赫, 蔡婧宜, 张会丰, 廖双泉(

)

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

Structural Characterization of Natural Rubber Molecular Side Chain

Linhe JIN, Jingyi CAI, Huifeng ZHANG, Shuangquan LIAO(

)

College of Material and Chemical Engineering, Hainan University, Key Laboratory Advanced Materials of Tropical Island Resources, Ministry of Education, Haikou 570228, China

引用本文:

金林赫, 蔡婧宜, 张会丰, 廖双泉. 天然橡胶分子链侧链结构的表征[J]. 材料研究学报, 2017, 31(5): 369-373.
Linhe JIN, Jingyi CAI, Huifeng ZHANG, Shuangquan LIAO. Structural Characterization of Natural Rubber Molecular Side Chain[J]. Chinese Journal of Materials Research, 2017, 31(5): 369-373.

全文: PDF(1869 KB) HTML

摘要:

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。

关键词 ：有机高分子材料, 天然橡胶, 分子链, 支链结构, 分析

Abstract：

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.

Key words： orgamic polymer materials natural rubber molecular chain branch structure analysis

收稿日期: 2016-11-01

基金资助:国家自然科学基金(51363006),公益性行业(农业)科研专项经费项目(20140366),海南省重大科技计划(ZDKJ2016- 020-02)

作者简介:

作者简介金林赫,男,1991年生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.631 或 https://www.cjmr.org/CN/Y2017/V31/I5/369

图1 DPNR的核磁共振氢谱图

图2 异戊二烯碳原子序号

表1 NR/DPNR/SPNR/SPNR-a的氮含量、分子量和链均氮原子数

图3 NR/DPNR/SPNR/SPNR-a的红外吸收谱图

图4 NR/DPNR/SPNR/SPNR-a的红外吸收谱图

图5 DPNR的核磁共振氢谱图

图6 天然橡胶分子链的结构模型

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