| 炭黑对丁苯橡胶耐热氧和紫外老化性能的影响 |
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| 引用本文： | 刘宏敏,杨其,冯彦龙,刘小林.炭黑对丁苯橡胶耐热氧和紫外老化性能的影响[J].合成橡胶工业,2009,32(1). |
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| 作者姓名： | 刘宏敏 杨其 冯彦龙 刘小林 |
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| 作者单位： | 四川大学,高分子科学与工程学院,高分子材料工程国家重点实验室,四川,成都,610065 |
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| 基金项目： | 国家自然科学基金重点项目，贵州省重点技术创新项目 |
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| 摘 要： | 研究了填充不同量炭黑对丁苯橡胶耐热氧和紫外老化性能的影响,测试了各试样的交联密度及物理机械性能,并用扫描电镜观察了其表面形貌.结果表明,丁苯橡胶在热氧老化开始时内部发生了以交联为主的反应,表面氧化缓慢;而在紫外老化开始时表面的变化较大,在老化过程中交联密度出现峰值;热氧和紫外老化120 h后,橡胶的硬度增加,表面变得致密,使热氧和紫外线侵入至橡胶内部变得困难,邵尔A硬度等物理机械性能的变化趋势减缓;炭黑填充量大于20份(质量)时SBR的耐紫外老化性能得到改善,老化360 h后物理机械性能保持率仍然较高,这是因为炭黑对紫外线有很好的屏蔽作用,而炭黑对SBR耐热氧老化性能的影响却相反.
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| 关 键 词： | 丁苯橡胶 炭黑 热氧老化 紫外老化 交联密度 物理机械性能 |
Effect of carbon black on thermal-oxidative and ultraviolet aging resistance of styrene-butadiene rubber vulcanizates |
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| Liu Hongmin,Yang Qi,Feng Yanlong,Liu Xiaolin.Effect of carbon black on thermal-oxidative and ultraviolet aging resistance of styrene-butadiene rubber vulcanizates[J].China Synthetic Rubber Industry,2009,32(1). |
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| Authors: | Liu Hongmin Yang Qi Feng Yanlong Liu Xiaolin |
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| Affiliation: | State Key Laboratory for Polymer Materials Engineering;College of Polymer Science and Engineering;Sichuan University;Chengdu 610065;China |
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| Abstract: | The thermal-oxidative and ultraviolet(UV) aging resistance of styrene-butadiene rubber(SBR) vulcanizates filled with different amount of carbon black were investigated,its crosslinking density and mechanical properties were measured,and its surface morphology was observed with scanning electron microscope.The results showed that the crosslinking occurred mainly in the inner SBR vulcanizate in the initial period of thermal-oxidative aging,but its surface oxidation was slow.However,the ozonition reaction occu... |
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| Keywords: | styrene-butadiene rubber carbon black thermal-oxidative aging ultraviolet aging crosslinking density mechanical property |
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