主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (10): 1443-1446.

• • 上一篇    下一篇

升温速率对油漆稀料和塑料共热解特性的影响

何芬芬，林庆文，刘 玲，岳海玲   

  1. 中国人民警察大学，河北 廊坊065000
  • 出版日期:2021-10-15 发布日期:2021-10-15
  • 作者简介:何芬芬（1998-），女，中国人民警察大学研究生二队硕士研究生，主要从事火灾调查技术研究，河北省廊坊市西昌路220号中国人民警察大学火灾物证鉴定中心，065000。

Effect of heating rate on the co-pyrolysis characteristics of paint thinners and plastics

HE Fen-fen, LIN Qing-wen, LIU Ling, YUE Hai-ling   

  1. China People's Police University，Hebei Langfang 065000，China
  • Online:2021-10-15 Published:2021-10-15

摘要： 为研究不同升温速率下油漆稀料与PET塑料共热解特性的变化规律，使用同步热分析仪，测定不同升温速率（10、20、30 K/min）条件下油漆稀料和PET塑料共热解过程中失重（TG）、焓变（DSC）的变化，并采用Coats-Redfern法对样品进行热动力学分析，探究油漆稀料和PET塑料两种材料的共热解行为受升温速率的影响。结果表明：在氮气气氛中，样品的热解过程存在明显的滞后现象；油漆稀料和PET塑料热解过程只存在1个主要失重阶段，混合物存在2个主要失重阶段；油漆稀料和PET塑料的热解活化能随着升温速率的提高而减小，混合物在升温速率低于30 K/min时热解反应受到抑制，在30 K/min升温速率下活化能最低，热解反应最彻底，最终样品残余量为8.4%，火灾危险性强。

关键词: 热动力学, 共热解, 升温速率, 油漆稀料, Coats-Redfern

Abstract: To study the change of co-pyrolysis characteristics of paint thinner and PET plastic at different heating rates，a simultaneous thermal analyzer was used to measure the weight loss (TG) and enthalpy change (DSC) of paint thinner and PET plastic during co-pyrolysis at different heating rates (10, 20, 30 K/min). The Coats-Redfern method was used to analyze the thermal dynamics of the samples. The influence of heating rate on the co-pyrolysis behavior of paint thinner and PET plastic was investigated. The results show that the pyrolysis process of the sample has obvious hysteresis in nitrogen atmosphere. There is only one major weightlessness stage in the pyrolysis process of paint thinner and PET plastic, and there are two major weightlessness stages in the pyrolysis process of mixture. The pyrolysis activation energy of paint thinner and PET plastic decreaesproceed with the increase of heating rate. The pyrolysis reaction of the mixture is inhibited when the heating rate is lower than 30 K/min, and the pyrolysis reaction is the most complete when the heating rate is lower than 30 K/min. The final sample residual amount is 8.4%, and the fire risk is high.

Key words: thermal dynamics, co-pyrolysis, heating rate, paint thinner, Coats-Redfern