|本期目录/Table of Contents|

[1]张 震,马 澜,房佳仪,等.硫化丁苯橡胶的高效热氧降解行为及过程[J].合成橡胶工业,2021,6:488-494.
　ZHANG Zhen,MA Lan,FANG Jia-yi,et al.Thermal-oxidative degradation behavior and process of vulcanized styrene-butadiene rubber[J].China synthetic rubber industy,2021,6:488-494.
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硫化丁苯橡胶的高效热氧降解行为及过程(PDF)

《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:
2021年6期
页码:
488-494
栏目:
出版日期:
2021-11-10

文章信息/Info

Title:
Thermal-oxidative degradation behavior and process of vulcanized styrene-butadiene rubber
文章编号:
1000-1255（2021）06-0488-07
作者:
张 震; 马 澜; 房佳仪; 王仕峰*
上海交通大学 化学化工学院/上海市电气绝缘与热老化重点实验室，上海 200240
Author(s):
ZHANG Zhen;  MA Lan;  FANG Jia-yi;  WANG Shi-feng
（School of Chemistry and Chemical Engineering/Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China）
关键词:
丁苯橡胶; 热氧降解; 溶胶含量; 凝胶交联密度; 硫键; 主链
Keywords:
styrene-butadiene rubber;  thermal-oxidation degradation;  sol content;  gel cross-linking density;  sulfur bond;  backbone
分类号:
TQ 333.1
DOI:
10.19908/j.cnki.ISSN1000-1255.2021.06.0488
文献标识码:
B
摘要:
采用溶胶–凝胶法、平衡溶胀测密度法、红外-质谱联用（FTIR-MS）法及原位傅里叶变换红外法研究了硫化丁苯橡胶（SBR）在高温下的热氧降解行为及过程。结果表明，210 ℃下硫化SBR在反应初期溶胶含量逐渐增加，10 min时溶胶质量分数达最高值28.1%，之后快速下降；150 ℃下的反应趋势与210 ℃时的相似，但反应速率相对较慢。FTIR-MS分析结果表明，硫化SBR在7 min时释放出少量二氧化硫，在12 min时释放出较大量其他含有羧基和硫杂环的氧化产物。此外，在210 ℃下，硫化SBR的交联键在反应初期由多硫键向单硫键转化，部分单硫键被氧化成为亚砜基团，乃至磺酸盐或硫酸盐；SBR主链氧化属于自催化氧化反应，固体产物中羰基含量在后期阶段保持稳定。
Abstract:
The thermal oxidative degradation behavior and process of vulcanized styrene-butadiene rubber (SBR) at high temperature was studied by the sol-gel analysis, equilibrium swelling method, Fourier transform infrared spectroscopy coupled with mass spectrometry (FTIR-MS) and in-situ Fourier transform infrared spectroscopy.The chemical structure changes of degradation process of the SBR vulcanizate at 210 ℃ were compared with those of 150 ℃.The results showed that the sol content of the SBR vulcanizate at 210 ℃ gradually increased in the initial stage of the reaction, reached a maximum value of 28.1% at 10 min, and then a significant decline occurred.The trend of the reaction at 150 ℃ was similar to that at 210 ℃, but the reaction rate was relatively slower.The vulcanized SBR produced a small amount of sulfur dioxide gas at 7 min and a relatively large amount of other oxidation products containing carboxyl group and thioheterocyclic group at 12 min were observed by FTIR-MS.The cross-linking bonds of the vulcanized SBR were initially converted from polysulfur bonds to monosulfur bonds, part of which were then oxidized to sulfoxide groups and further to sulfonyl groups or sulfates.The backbone oxidation of the SBR vulcanizate was an autocatalytic oxidation, and the carbonyl group content remained stable during the late stage of oxidation.

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备注/Memo

备注/Memo:
收稿日期：2021-02-24；修订日期：2021-08-22。
作者简介：张震（1993—），男，河南林州人，博士研究生。主要从事橡胶绿色解交联及再利用方面的研究工作。
基金项目：政府间国际科技创新合作项目（2021 YFE 0105200）。
*通讯联系人。
更新日期/Last Update: 2021-11-10