文档介绍：化学工程师
Sum 172 Chemical Engineer 2010 年第 1 期
文章编号: ( )
工 1002-1124 2010 01-0068-03
程
师木塑复合材料热解动力学
园 PVC
地
徐建中,宿磊,谢吉星,屈红强
(河北大学化学与环境科学学院,河北保定 071002)
摘要:将木粉按一定比例添加到中得到复合材料,通过热重分析研究复合材料在空气气氛下
PVC 、N2
不同升温速率时的热解行为。通过 Doyle 和 Tang method 法计算了木塑材料的降解活化能。利用活化能分布函
数,分析了复合材料在热解、燃烧过程中不同阶段的反应活性变化规律。研究表明,热解过程可分为 3 个阶
段,230~360℃为第一失重阶段,360~430℃为稳定阶段,430~580℃为第二失重阶段。升温速率及反应气氛
对热解过程有显著影响。由分布活化能模型计算表明,其热解动力学为一级反应,两个失重阶段的活化能分
别为 220kJ·mol- 1 和 139kJ·mol- 1,反应活性随失重率的增加而减少。
关键词:木塑复合;热重;热解动力学;活化能
中图分类号: 文献标识码:A
Pyrolysis ics of wood-posite materials about PVC
XU Jian-zhong,SU Lei,XIE Ji-xing,QU Hong-qiang
(College of Chemistry and Environmental Science,Hebei University,Baoding 071002,China)
Abstract: posite materials which was added a certain percentage of wood flour to -
gravimetric analysis (TG)was used to study the pyrolysis char- acteristics posite materials, at different heat-
,
ing rates in the stream of air or N2 .Comulate posite materials’distribution activation energy through Doyle
and Tang method. The results of the pyrolysic experiment indicate that the degradatio n process can be divided in-
to three stages,the first weight loss stage of 230~360℃,thermally stable stage of 360~430℃ and the second weight
loss stage of 430~580℃. The thermal degradation behaviors posite materials resin are affected greatly by
h