摘要
为了探究汽车零部件注(吹)塑粒子的热处理特性,利用热重分析仪对北京顺义区6家典型汽车零部件企业的24种树脂粒子的失重特性进行分析。结果表明,24种树脂粒子在热重模拟注(吹)塑加工过程失重都较少。利用Kissinger-Akahira-Sunose(KAS)和Horowitz、Metzger提出的积分法计算得到24种树脂的平均活化能E为31.962~202.037 kJ/mol。同时,选取典型聚丙烯(PP)树脂粒子,在5、20和30℃/min不同升温速率下进行热重分析,利用Flynn-Wall-Ozawa(FWO)、KAS、Starink三种等转化率法计算动力学参数,得到典型PP树脂在氮气气氛下热解反应的E分别是85.433、88.500和85.671 kJ/mol。采用积分主图分析法(Master-plots法)基于20℃/min热重分析确定其反应动力学最佳拟合模型为A4模型,反应机理函数为:f(x)=4(1-x)[-ln(1-x)]^(3/4),热解反应符合随机成核和核生长模型。
In order to investigate the heat treatment characteristics of injection(blown)plastic particles of auto parts,the weight loss characteristics of 24 kinds of resin particles from 6 typical auto parts enterprises in Shunyi District of Beijing were analyzed by thermogravimetric analyzer.The results show that the weight loss of 24 kinds of resin particles in the thermogravimetric simulation injection(blow)molding process is less.Using the integral methods proposed by Kissinger-Akahira-Sunose(KAS),Horowitz and Metzger,the average activation energy(E)of 24 kinds of resins is 31.962-202.037 kJ/mol.At the same time,the typical polypropylene(PP)resin particles were selected for thermogravimetric analysis at different heating rates of 5,20 and 30℃/min.The kinetic parameters were calculated by three iso-conversional methods of Flynn-Wall-Ozawa(FWO),KAS and Starink.The E values of typical PP resins under nitrogen atmosphere are respectively 85.433,88.500 and 85.671 kJ/mol.The best fitting reaction kinetics model is A4,which is determined via applying Master-plots methods based on the thermogravimetric analysis at 20℃/min.And the reaction mechanism function is as follows:f(x)=4(1-x)[-ln(1-x)]3/4.The pyrolysis reactions are consistent with random nucleation and nuclear growth models.
作者
杨宁
朱梓涵
杨候剑
吕竹明
韩兵
苏心仪
董黎明
YANG Ning;ZHU Zihan;YANG Houjian;LYU Zhuming;HAN Bing;SU Xinyi;DONG Liming(Beijing Shunyi District Ecological Environment Bureau,Beijing 101399,China;Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry,Beijing Technology and Business University,Beijing 100048,China;Beijing Pollution Source Affairs Management Center,Beijing 100012,China;Zhongke Guoqing(Beijing)Environmental Development Co.,Ltd.,Beijing 100089,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2024年第4期150-157,188,共9页
China Plastics Industry
关键词
汽车零部件
树脂粒子
热处理特性
动力学
等转化率法
机理模型
聚丙烯
Automobile Parts
Resin Particle
Heat Treatment Characteristic
Kinetics
Iso-conversional Method
Mechanism Model
Polypropylene
