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[1]颜龙,王文强,徐志胜,等.热老化对阻燃电缆护套层的燃烧性能与热解动力学的影响*[J].中国安全生产科学技术,2023,19(9):143-149.[doi:10.11731/j.issn.1673-193x.2023.09.021]
　YAN Long,WANG Wenqiang,XU Zhisheng,et al.Influence of thermal aging on combustion performance and pyrolysis kinetics of flame retardant cable sheathing[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(9):143-149.[doi:10.11731/j.issn.1673-193x.2023.09.021]
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热老化对阻燃电缆护套层的燃烧性能与热解动力学的影响*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年9期
页码:
143-149
栏目:
职业安全卫生管理与技术
出版日期:
2023-09-30

文章信息/Info

Title:
Influence of thermal aging on combustion performance and pyrolysis kinetics of flame retardant cable sheathing
文章编号:
1673-193X(2023)-09-0143-07
作者:
颜龙; 王文强; 徐志胜; 陈善求
（1.中南大学 防灾科学与安全技术研究所，湖南 长沙 410075；
2.金杯电工股份有限公司，湖南 长沙 410205）
Author(s):
YAN Long;  WANG Wenqiang;  XU Zhisheng;  CHEN Shanqiu
(1.Institute of Disaster Prevention Science and Safety Technology,Central South University,Changsha Hunan 410075,China;
2.Gold Cup Electric Apparatus Co.,Ltd.,Changsha Hunan 410205,China)
关键词:
阻燃电缆; 热老化; 阻燃性能; 热解性能; 热解动力学
Keywords:
flame retardant cables;  thermal aging;  flame retardant property;  pyrolysis performance;  pyrolysis kinetics
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2023.09.021
文献标志码:
A
摘要:
为研究热老化温度对电缆服役安全性的影响，利用氧指数测试仪、垂直燃烧测试仪、万能试验机和热重分析仪分析热老化温度对电缆护套层的阻燃性能、力学性能和热解性能的影响，并运用Broido和Zavkovic热解动力学模型获得护套材料的表观活化能和指前因子。研究结果表明：热老化显著降低护套材料的断裂伸长率，但可提升护套材料的极限氧指数（LOI）和拉伸强度，其中护套的LOI值随热老化温度的增加而增大；在150 ℃的温度下老化21 d，电缆护套层的LOI由25.5%升高至45.0%，但断裂伸长保留率仅为4.0%；热重分析表明，电缆护套材料的初始分解温度随热老化温度的增加先升高后降低，其中经150 ℃热老化处理的电缆护套材料初始分解温度明显下降；热解动力学分析表明，热老化前后电缆护套层的热稳定性变化与其表观活化能有关，其中热老化后材料的热稳定性随表观活化能的增加而提高。研究结果可为电缆的日常维护和防火工作提供理论指导。
Abstract:
To study the influence of thermal aging temperature on the safety of cables in service,the influence of thermal aging temperature on the flame retardant properties,mechanical properties and pyrolysis properties of cable sheathing was analyzed by using the oxygen index tester,vertical burning tester,universal testing machine and thermogravimetric analyzer,and the apparent activation energy and pre-exponential factor of the sheathing material were obtained using the Broido and Zavkovic pyrolysis kinetic models.The results show that the thermal aging significantly reduces the elongation at break of the sheathing material,but enhances the limiting oxygen index (LOI) and tensile strength of the sheathing material,where the LOI value of the sheathing material increases with the increase of the thermal aging temperature.The LOI value of the cable sheathing increases from 25.5% to 45.0% after aging at 150 ℃ for 21 days,but the elongation at break is only 4.0% of that before aging.The thermogravimetric analysis shows that the initial decomposition temperature of cable sheathing material increases first and then decreases with the increase of thermal aging temperature,among which the initial decomposition temperature of cable sheathing material treated by 150 ℃ thermal aging decreases significantly.The pyrolysis kinetics analysis shows that the change of thermal stability of cable sheathing before and after thermal aging is related to its apparent activation energy,where the thermal stability of the material after thermal aging increases with the increase of apparent activation energy.The results can provide theoretical guidance for routine maintenance and fire prevention of cables.

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备注/Memo

备注/Memo:
收稿日期： 2023-03-19；网络首发日期： 2023-09-22
* 基金项目： 国家自然科学基金项目（52276143）；湖南省高新技术产业科技创新引领计划项目（2021GK4032）；国家消防救援局科技计划项目（2023XFCX10）
作者简介： 颜龙，博士，副教授，主要研究方向为防火阻燃材料。
通信作者： 徐志胜，博士，教授，主要研究方向为火灾科学与消防工程等。
更新日期/Last Update: 2023-10-12