| 降解地膜的热解特性及热动力学研究 |
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| 作者姓名： | WANG Xing L&#; Jia-Long ZHANG Yi-Ping |
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| 作者单位： | [1]College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100 （China） [2]Shaanxi Provincial Bureau of Soil and Water Conservation, Xi＇an 710004 （China） |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | Developing degradable films is an important means for resolving the problem of film pollution; however, in recent years, there have been only few studies related to the thermal analysis of degradable plastic films. This research detailed the composition and pyrolysis of one kind of ordinary and three kinds of degradable plastic films using the differential thermal analysis （DTA） technique. The results showed that degradable films and ordinary film had similar DTA curves, which reflected their similar compositions; however, small differences were measured, which were due to the added constituents of the degradable films. The pyrolysis reaction orders of each film were about 0.93. The pyrolysis activation energies and pre-exponential factors followed the order of ordinary film 〉 photodegradable film 〉 photodegradable calcium carbonate film 〉 biodegradable film. The results of this research laid the foundation for new theories for harnessing soil pollution caused by plastic films.
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| 关 键 词： | 可降解薄膜 示差热分析 高温分解 热动力学 |
| 收稿时间： | 25 January 2007 |
| 修稿时间： | 2007-01-252007-05-24 |
Pyrolysis characteristics and thermal kinetics of degradable films |
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| WANG Xing,L&#; Jia-Long,ZHANG Yi-Ping.Pyrolysis characteristics and thermal kinetics of degradable films[J].Pedosphere,2007,17(5):654-659. |
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| Authors: | WANG Xing L&#; Jia-Long and ZHANG Yi-Ping |
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| Institution: | College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100 (China). E-mail: shanxist@163.com
;Shaanxi Provincial Bureau of Soil and Water Conservation, Xi'an 710004 (China);College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100 (China). E-mail: shanxist@163.com
;;College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100 (China). E-mail: shanxist@163.com
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| Abstract: | Developing degradable films is an important means for resolving the problem of film pollution;however, in recent years, there have been only few studies related to the thermal analysis of degradable plastic films. This research detailed the composition and pyrolysis of one kind of ordinary and three kinds of degradable plastic films using the differential thermal analysis (DTA) technique. The results showed that degradable films and ordinary film had similar DTA curves, which reflected their similar compositions; however, small differences were measured, which were due to the added constituents of the degradable films. The pyrolysis reaction orders of each film were about 0.93. The pyrolysis activation energies and pre-exponential factors followed the order of ordinary film > photodegradable film > photodegradable calcium carbonate film > biodegradable film. The results of this research laid the foundation for new theories for harnessing soil pollution caused by plastic films. |
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| Keywords: | degradable film differential thermal analysis pyrolysis thermal kinetics |
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