Thermal degradation kinetics of rigid polyurethane foams blown with water
文献类型：期刊论文
| 作者 | Li, Xiao-Bin; Cao, Hong-Bin; Zhang, Yi |
| 刊名 | JOURNAL OF APPLIED POLYMER SCIENCE
 |
| 出版日期 | 2006-12-05 |
| 卷号 | 102期号:5页码:4149-4156 |
| 关键词 | rigid polyurethane foams thermogravimetric analysis thermal degradation degradation kinetics |
| ISSN号 | 0021-8995 |
| 其他题名 | J. Appl. Polym. Sci. |
| 中文摘要 | The thermal decomposition behavior of rigid polyurethane foams blown with water was studied by dynamic thermogravimetric analysis (TGA) in both nitrogen and air atmosphere at several heating rates ranging from room temperature to 800 degrees C. The kinetic parameters, such as activation energy (E), degradation order (n), and pre-exponential factor (A) were calculated by three single heating rate techniques of Friedman, Chang, and Coats-Redfern, respectively. Compared with the decomposition process in nitrogen, the decomposition of foams in air exhibits two distinct weight loss stages. The decomposition in nitrogen has the same mechanism as the first stage weight loss in air, but the second decomposition stage in air appears to be dominated by the thermo-oxidative degradation. The heating rates have insig- nificant effect on the kinetic parameters except that the kinetic parameters at 5 C/min have higher values in nitrogen and lower values in air, indicating different degradation kinetics in nitrogen and air. The kinetic parameters of foam samples blown with different water level in formulation decline firstly and then increase when water level increases from 3.0 to 7.0 pph. According to the prediction for lifetime and half-life time of foams, water-blown rigid foams have excellent thermostability, when used as insulation materials below 100 degrees C. (c) 2006 Wiley Periodicals, Inc. |
| 英文摘要 | The thermal decomposition behavior of rigid polyurethane foams blown with water was studied by dynamic thermogravimetric analysis (TGA) in both nitrogen and air atmosphere at several heating rates ranging from room temperature to 800 degrees C. The kinetic parameters, such as activation energy (E), degradation order (n), and pre-exponential factor (A) were calculated by three single heating rate techniques of Friedman, Chang, and Coats-Redfern, respectively. Compared with the decomposition process in nitrogen, the decomposition of foams in air exhibits two distinct weight loss stages. The decomposition in nitrogen has the same mechanism as the first stage weight loss in air, but the second decomposition stage in air appears to be dominated by the thermo-oxidative degradation. The heating rates have insig- nificant effect on the kinetic parameters except that the kinetic parameters at 5 C/min have higher values in nitrogen and lower values in air, indicating different degradation kinetics in nitrogen and air. The kinetic parameters of foam samples blown with different water level in formulation decline firstly and then increase when water level increases from 3.0 to 7.0 pph. According to the prediction for lifetime and half-life time of foams, water-blown rigid foams have excellent thermostability, when used as insulation materials below 100 degrees C. (c) 2006 Wiley Periodicals, Inc. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Polymer Science |
| 研究领域[WOS] | Polymer Science |
| 关键词[WOS] | PYROLYSIS ; BEHAVIOR |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000241593700010 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4106]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Lab Green Proc & Engn, Inst Proc Engn, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xiao-Bin,Cao, Hong-Bin,Zhang, Yi. Thermal degradation kinetics of rigid polyurethane foams blown with water[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2006,102(5):4149-4156. |
| APA | Li, Xiao-Bin,Cao, Hong-Bin,&Zhang, Yi.(2006).Thermal degradation kinetics of rigid polyurethane foams blown with water.JOURNAL OF APPLIED POLYMER SCIENCE,102(5),4149-4156. |
| MLA | Li, Xiao-Bin,et al."Thermal degradation kinetics of rigid polyurethane foams blown with water".JOURNAL OF APPLIED POLYMER SCIENCE 102.5(2006):4149-4156. |
入库方式： OAI收割
来源：过程工程研究所
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