Structures and physical properties of rigid polyurethane foams with water as the sole blowing agent
文献类型：期刊论文
| 作者 | Li Xiaobin; Cao Hongbin; Zhang Yi |
| 刊名 | SCIENCE IN CHINA SERIES B-CHEMISTRY
 |
| 出版日期 | 2006-08-01 |
| 卷号 | 49期号:4页码:363-370 |
| 关键词 | polyether polyol polyurethane rigid foam compressive strength dimensional stability cell size glass transition temperature |
| ISSN号 | 1006-9291 |
| 其他题名 | Sci. China Ser. B-Chem. |
| 中文摘要 | Rigid polyurethane foams blown by varying water level were prepared in this study. The structures and physical properties of rigid polyurethane foams blown by water were measured with FT-IR, universal testing machine (Instron3365), scanning electron microscope (SEM) and differential scanning calorimeter (DSC). The results show that polyurea and polybiuret were the typical characteristics, and the cream time and gel time were shorter for the fully water blown rigid foams than that for the fully cyclopentane blown foams. The density of foam samples decreased from 45.0 kg/m(3) to 27.4 kg/m(3) with the increase of water level from 3 pph to 7 pph. Compressive strength exhibited the similar behavior with density. The average cell size of foam samples ranged from 241 mu m to 356 mu m with the increase of water level from 3 pph to 7 pph, respectively. At the same time, poorer dimensional stability was encountered with the increase of average cell size due to fast diffusion rate of CO2 out of the foam. The results of thermal analysis show that the glass transition temperature (T-g) shifted to a higher temperature with the increase of isocyanate level when more water was used as chemical blowing agent. |
| 英文摘要 | Rigid polyurethane foams blown by varying water level were prepared in this study. The structures and physical properties of rigid polyurethane foams blown by water were measured with FT-IR, universal testing machine (Instron3365), scanning electron microscope (SEM) and differential scanning calorimeter (DSC). The results show that polyurea and polybiuret were the typical characteristics, and the cream time and gel time were shorter for the fully water blown rigid foams than that for the fully cyclopentane blown foams. The density of foam samples decreased from 45.0 kg/m(3) to 27.4 kg/m(3) with the increase of water level from 3 pph to 7 pph. Compressive strength exhibited the similar behavior with density. The average cell size of foam samples ranged from 241 mu m to 356 mu m with the increase of water level from 3 pph to 7 pph, respectively. At the same time, poorer dimensional stability was encountered with the increase of average cell size due to fast diffusion rate of CO2 out of the foam. The results of thermal analysis show that the glass transition temperature (T-g) shifted to a higher temperature with the increase of isocyanate level when more water was used as chemical blowing agent. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | DISTILLED WATER |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000240332800011 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4082]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Process 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 Xiaobin,Cao Hongbin,Zhang Yi. Structures and physical properties of rigid polyurethane foams with water as the sole blowing agent[J]. SCIENCE IN CHINA SERIES B-CHEMISTRY,2006,49(4):363-370. |
| APA | Li Xiaobin,Cao Hongbin,&Zhang Yi.(2006).Structures and physical properties of rigid polyurethane foams with water as the sole blowing agent.SCIENCE IN CHINA SERIES B-CHEMISTRY,49(4),363-370. |
| MLA | Li Xiaobin,et al."Structures and physical properties of rigid polyurethane foams with water as the sole blowing agent".SCIENCE IN CHINA SERIES B-CHEMISTRY 49.4(2006):363-370. |
入库方式： OAI收割
来源：过程工程研究所
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