PVC导线绝缘层过负荷条件下的热重分析  

Thermogravimetric analysis on analysis of overload insulation layer of PVC wire

作　　者：蔡晓宇[1] 窦彤阳[1] 

机构地区：[1]中国人民武装警察部队学院,河北廊坊065000

出　　处：《消防科学与技术》2017年第2期160-162,共3页Fire Science and Technology

摘　　要：应用热重分析法对PVC导线绝缘层原样以及4倍过电流后绝缘层内、外层的热解行为进行比较,并分析不同升温速率对导线绝缘层内层热解行为的影响。结果表明,三种样品在300~1 000℃温度升高范围内均有三个失重阶段,同一升温速率下,过负荷后的样品每个失重阶段的最大失重温度均比原样略高;导线绝缘层内层的热解行为不随升温速率改变而改变。Using thermogravimetric analysis method, compared the insulation layer of PVC wire and inner and outer layer of in- sulation layer of PVC wire after four-times overcurrent, and an- alyzed the influence of different temperature rise rate on pyroly- sis behavior of inner insulation layer. The results showed that three mass loss stages occurred during 300~ 1 000 ℃ for the three samples; at the same temperature rise rate, compared to the raw sample, the highest mass loss temperature was a little higher for the overcurrent samples; the pyrolysis behavior of inner insulation layer stayed the same with the temperature rise rate change.

关 键 词：PVC导线 过负荷 绝缘层 热重分析法 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]