Improving the Aging Resistance of Styrene-Butadiene-Styrene Tri-Block Copolymer and Application in Polymer-Modified Asphalt
Improving the Aging Resistance of Styrene-Butadiene-Styrene Tri-Block Copolymer and Application in Polymer-Modified Asphalt
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提高苯乙烯-丁二烯-苯乙烯三嵌段共聚物的耐老化性能及其在聚合物改性沥青中的应用
DOI：
10.1002/app.31458
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发表时间：
2010-04-15
影响因子：
3
通讯作者：
Yao, Side
中科院分区：
文献类型：
--
作者：
Li, Yintao;Li, Linfan;Yao, Side
采用热分析、动态力学分析和傅立叶变换红外光谱等多种分析和光谱方法研究了苯乙烯-丁二烯-苯乙烯（SBS）共聚物的热氧化过程。实验结果表明，SBS的热氧化过程是一个自由基自催化反应，包含链的引发、链增长、转移和链终止四个步骤，同时存在交联和断裂，并证实后者是主要过程。采用自由基清除剂1010和氢过氧化物分解剂168来提高SBS共聚物的抗氧化老化性能。实践中发现，1010和168的协同作用可能是最好的，0.2wt％1010+0.4wt％168可以有效防止SBS在一定温度下的热氧化。此外，通过添加复合抗氧化剂，提高了SBS改性沥青的耐老化性能。 (C) 2009 年 Wiley 期刊公司 J Appl Polym Sci 116: 754-761, 2010
Thermal oxidation process of styrene-butadiene-styrene (SBS) copolymer was studied by using a variety of analytical and spectroscopic methods including thermal analysis, dynamic mechanical analysis and FTIR spectroscopy. The experimental results indicate that the thermal oxidation process of SBS is a free radical self-catalyzed reaction containing four steps (initiation, growth, transfer, and termination of the chain) with both crosslinking and scission and the latter is confirmed to be the main process. The antioxidants 1010 as scavenger of free radicals and 168 acting decomposition of hydroperoxides were used to improve the oxidation aging resistance of SBS copolymer. It has been found that synergic effect of 1010 and 168 may be the best in practice and 0.2 wt % 1010 + 0.4 wt % 168 can effectively prevent SBS from the thermal oxidation at certain temperature. Furthermore, the aging resistance of the SBS-modified asphalt was improved by addition of complex antioxidants. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 116: 754-761, 2010