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为评价过硫酸铵胶囊破胶剂在运输中的自反应危险性,按照联合国《关于危险货物运输的建议书——试验与标准手册》中的H 2方法,采用绝热杜瓦量热仪对过硫酸铵胶囊破胶剂进行绝热储存试验,并计算了该物质在3种典型包装下的自加速分解温度。结果表明,分解反应分为2步,其活化能接近,这2步反应实质上是同一反应,即最初反应进行到一定阶段后由于接触面上的反应物消耗和产物积累而停止,而温度升高又引起包覆的聚合物软化,增大了反应物接触面和产物的扩散速度,从而使反应重新开始。研究表明,该物质的包装件不应划入联合国规定的4.1项危险品中的自反应性物质。
In order to evaluate the risk of self-reaction of ammonium persulfate capsule breakers in transport, according to the H 2 method in the UN Manual on Recommendations for the Transport of Dangerous Goods, Manual of Tests and Criteria, the adiabatic Dewar calorimeter Ammonium sulfate capsule breaker was tested for adiabatic storage and the self-accelerating decomposition temperature of the material in three typical packages was calculated. The results show that the decomposition reaction is divided into two steps, the activation energy is close to the two reactions are essentially the same reaction, that is, the initial reaction to a certain stage after the contact surface due to consumption of reactants and product accumulation stopped, and the temperature rise High and caused the coated polymer to soften, increasing the rate of diffusion of the reactant interface and product, thereby allowing the reaction to start over. Studies have shown that packages of this substance should not be assigned to self-reactive substances in the UN dangerous goods category 4.1.