摘要
采用熔融共混法制备了煤粉/聚氯乙烯(PVC)复合材料,利用热重分析研究了质量分数为5%、10%、15%煤粉含量对PVC在高纯度氩气中的热稳定性影响。通过Kissinger方法研究其热降解动力学,计算其热降解表观活化能(Ea),并利用扫描电镜对复合材料的断口进行分析。结果表明,共混体系的热降解过程表现为2个失重阶段,煤粉对PVC第一阶段热降解活化能影响不大,但提高了第二阶段热降解活化能。在煤粉加入质量分数为10%时,第二阶段Ea达到了最大值218.7kJ/mol,较纯PVC提高了58.5kJ/mol。通过复合材料的断口扫描电镜照片发现,共混体系的热稳定性与煤粉的含量和分布有关。
Pulverized coal/poly(vinyl chloride)(PVC)composites were prepared by melt blending,and the effects of the pulverized coal content on thermal stability of pulverized coal/PVC composites were investigated by TG in highly pure Ar atmosphere.The thermal degradation kinetics and thermal degradation activation energy(Ea)of the blends were studied by Kissinger methods,and fractures of coal/PVC composite were observed through SEM.The results show that non-isothermal degradation of pulverized coal/PVC blends is composed of a two-stage degradation process.Pulverized coal has little effect on Eaof the first stage degradation,but enhances Eain the second stage degradation.When the mass fraction of pulverized coal is 10%,Eareaches the maximum(218.7kJ/mol),which is greater by 58.5kJ/mol than that of pure PVC.The SEM micrographs show that the thermal stability of blends is influenced by the content and distribution of pulverized coal.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第11期88-91,97,共5页
Polymer Materials Science & Engineering
基金
河南省安全生产科技发展计划(H12-089)
河南理工大学博士基金(B2013-010)
国家级大学生创新创业训练计划项目(201210460019)
河南省高等学校矿业工程材料重点学科开放实验室开放基金(MEM13-14)
关键词
煤粉
聚氯乙烯
热稳定性
动力学
pulverized coal
poly(vinyl chloride)
thermal stability
kinetics
