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气氛对低氮天然橡胶热降解的影响
Effects of atmospheres on thermal degradation of low protein natural rubber
【摘要】 采用热重分析(TG),研究了恒定升温速率下,低蛋白橡胶在氮气和空气气氛中的热降解行为,考察了反应气氛对降解速率、降解率和动力学参数的影响,分析了两者降解机理的可能差别。发现降解温度和降解率,氮气中均高于空气中;表观反应级数氮气中为2.0级,空气中为1.9级。
【Abstract】 The processes of the thermal degradation of low protein natural rubber in N2 or air have been studied by using TG and DTG.The effects of the atmospheres on the degradation rate,degree of degradation and kinetics parameter are tested and the difference of the reaction mechanism of both is analyzed.It had been found that the temperatures,degrees of degradation in N2 are higher than those in air.The apparent degradation reaction order in N2 is 2.0 and it is 1.9 in air.
【关键词】 低蛋白天然橡胶；
热降解；
热氧降解；
降解动力学；
【Key words】 low-protein natural rubber； thermal degradation； thermal oxidative degradation； kineties of degradation；
【Key words】 low-protein natural rubber； thermal degradation； thermal oxidative degradation； kineties of degradation；
【基金】 国家自然基金资助项目(50063001);农业部天然橡胶加工重点开发实验室资助项目
- 【文献出处】 应用化工 ,Shaanxi Chemical Industry , 编辑部邮箱 ,2004年02期
- 【分类号】TQ330
- 【被引频次】5
- 【下载频次】100