Effect of cosolvent on solid phase transitions of alpha- to beta-form crystal of syndiotactic polystyrene occurred in supercritical CO2 containing solvent
文献类型：期刊论文
| 作者 | Liao, Xia; He, Jiasong; Zhang, Jun; Ma, Weiming |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
 |
| 出版日期 | 2007-07-01 |
| 卷号 | 45期号:13页码:1625-1636 |
| 关键词 | Cosolvent Polymorphism Polystyrene Solid Phase Transition Supercritical Co2 Syndiotactic Polystyrene Transitions |
| ISSN号 | 0887-6266 |
| DOI | 10.1002/polb.21155 |
| 英文摘要 | The solid phase transition mechanism of alpha- to beta-form crystal upon specific treating with supercritical CO2 + cosolvent on original pure a and mixed (alpha+beta) form syndiotactic polystyrene (sPS) was investigated, using wide angle X-ray diffraction and differential scanning calorimetry measurements as a function of temperature, pressure, and cosolvent content. As in the supercritical CO2, sPS in supercritical CO2 + cosolvent underwent solid phase transitions from alpha- to beta-form, and higher temperature or higher pressure favored this transformation. Due to the higher dipole moment of acetone, small amounts of acetone used as cosolvent with CO2 made the transition of alpha- to beta-form occur at lower temperature and pressure than in supercritical CO2, and made the a-form crystal completely transform to beta-form in the original mixed (alpha+beta) form, whereas ethanol did not. The original beta-form crystal in the original mixed (alpha+beta) form sample acted as the nucleus of new beta-form crystal in the presence of cosolvent as it did in supercritical CO2, when compared with the original pure a-form sample. (c) 2007 Wiley Periodicals, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000247282100012 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/62107]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | He, Jiasong |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liao, Xia,He, Jiasong,Zhang, Jun,et al. Effect of cosolvent on solid phase transitions of alpha- to beta-form crystal of syndiotactic polystyrene occurred in supercritical CO2 containing solvent[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2007,45(13):1625-1636. |
| APA | Liao, Xia,He, Jiasong,Zhang, Jun,&Ma, Weiming.(2007).Effect of cosolvent on solid phase transitions of alpha- to beta-form crystal of syndiotactic polystyrene occurred in supercritical CO2 containing solvent.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,45(13),1625-1636. |
| MLA | Liao, Xia,et al."Effect of cosolvent on solid phase transitions of alpha- to beta-form crystal of syndiotactic polystyrene occurred in supercritical CO2 containing solvent".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 45.13(2007):1625-1636. |
入库方式： OAI收割
来源：化学研究所
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