摘要
材料的热释放速率是决定火灾灾害的关键因素。基于耗氧原理的锥形量热仪不仅能够准确、方便地测得材料燃烧过程中的热释放速率 ,而且还能够获得材料其它诸多燃烧性能 ,这有助于综合评价材料的燃烧特性。然而 ,燃烧反应是一个非常复杂的物理化学过程 ,一些基本参数会影响测热结果。文中介绍了高分子材料锥形量热法测热的耗氧原理以及热释放速率的计算公式 ,并讨论了公式中的主要参数 (包括耗氧燃烧热值 E、膨胀因子 α和反应系数 β)对高分子材料热释放速率的影响以及相应的校正方法。分析表明 ,尽管不同的材料有不同的 E、α和 β值 ,但是大多数情况下锥形量热仪采用标准的 E、α和 β值 ,误差不大。若有必要 。
The heat release rate is the key factor that determines fire hazards. The cone calorimeter based on the oxygen consumption principle can be conveniently used to measure not only heat release rates but also many other flammability properties during burning. However the actual combustion reaction is a very complicated physico-chemical process. Some essential parameters of the cone calorimeter for polymers, such as α,β and E values may affect the measurement of heat release rates. It was described that oxygen consumption principle and the equations for the measurement of heat release rates for polymeric materials using the cone calorimeter. The effects of essential parameters α,β and E values of different polymers on heat release rate measurement were discussed in detail and the corresponding correction methods were proposed. The results show that if more accurate measurement is required, the correction methods can be used to improve results.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2003年第4期27-30,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金项目 ( 5 0 1760 2 1)
国家重点基础研究专项经费资助项目 ( 2 0 0 1CB40 960 0
