无卤阻燃聚乙烯的热分解动力学研究  

Thermal degradation kinetics of halogen-free flame-retarded polyethylene composites

作　　者：黄玲[1] 王正洲[1] 梁好均[2] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230027 [2]中国科学技术大学高分子科学与工程系,安徽合肥230026

出　　处：《中国科学技术大学学报》2006年第1期34-38,55,共6页JUSTC

基　　金：国家自然科学基金(50273036);国家重点基础研究发展规划项目(2001CB409600)资助

摘　　要：采用六种不同的动力学分析方法,即Coats-Redfern方法、Van Krevelen方法、Horowitz-Metzger方法、Freeman-Carroll方法、Flynn-Wall方法以及Kissinger方法对氢氧化镁(MH)和红磷(RP)无卤阻燃聚乙烯体系的热分解动力学进行了探讨.前面四种方法计算的结果比较接近,阻燃聚乙烯的活化能比未阻燃聚乙烯的高,活化能顺序为PEMHRP>PEMH>LLDPE,说明了阻燃聚乙烯有着更好的热稳定性.Kissinger方法和Flynn-Wall方法的结果相近,但与其他四种方法的计算结果相差较大,可能不适用于本体系.Six analysis methods including the Coats-Redfern method, Van Krevelen method, Flynn-Wall method, Horowitz-Metzger method, Freeman-Carroll method and Kissinger method were used to investigate the thermal degradation kinetics of low-density polyethylene（LLDPE）and halogen-free flame-retarded LLDPE composites containing magnesium hydroxide （MH） and red phosphorus （RP） （PEMH and PEMHRP）. The results obtained by the first four methods are similar and it has been found that the activation energies of the flame-retarded composites are higher than the value of LLDPE, which shows that the flame-retarded LLDPE composites have better thermal stabilities. The values from Kissinger method are close to that from Flynn-Wall method, but they are smaller than those from the other four methods and possibly the two methods are not suitable for the system.

关 键 词：聚乙烯 热重分析 无卤阻燃 热分解动力学 

分 类 号：O632.12[理学—高分子化学]