Melt, hydration, and micellization of the PEO-PPO-PEO block copolymer studied by FTIR spectroscopy
文献类型：期刊论文
| 作者 | Su, YL; Wang, J; Liu, HZ |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2002-07-15 |
| 卷号 | 251期号:2页码:417-423 |
| 关键词 | PEO-PPO-PEO block copolymer melt hydration micellization FTIR |
| ISSN号 | 0021-9797 |
| 其他题名 | J. Colloid Interface Sci. |
| 中文摘要 | Fourier transform infrared (FTIR) spectroscopy was used to study the conformational changes of the polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) block copolymer, Pluronic P104, in a large concentration range in a polymer-water system as a function of temperature. The melt in which the conformational transition of the PEO blocks occurs gives remarkable changes in the spectral behavior. A small amount of water in Pluronic P104 can induce the PEO block amorphism. The addition of more water only swells the PEO dominant region and gives no significant difference in the conformational structure of the block copolymer in the ordered phases of Pluronic P104-water mixtures. The PPO blocks of Pluronic P104 are hydrated only in a condition of lower temperature and higher water content. The temperature dependent micellization of Pluronic P104 in water was analyzed by a FTIR spectroscopic method. The appearance of the symmetric deformation band of the anhydrous methyl groups at temperature below the CMT indicates the existence of a hydrophobic microenvironment. The appearance of the symmetric deformation band of the hydrated methyl groups at higher temperatures indicates that the micellar core must contain some amount of water. The results of FTIR data show that the proportion of the anhydrous methyl groups increases and water content in the micellar core decreases during the micellization process. (C) 2002 Elsevier Science (USA). |
| 英文摘要 | Fourier transform infrared (FTIR) spectroscopy was used to study the conformational changes of the polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) block copolymer, Pluronic P104, in a large concentration range in a polymer-water system as a function of temperature. The melt in which the conformational transition of the PEO blocks occurs gives remarkable changes in the spectral behavior. A small amount of water in Pluronic P104 can induce the PEO block amorphism. The addition of more water only swells the PEO dominant region and gives no significant difference in the conformational structure of the block copolymer in the ordered phases of Pluronic P104-water mixtures. The PPO blocks of Pluronic P104 are hydrated only in a condition of lower temperature and higher water content. The temperature dependent micellization of Pluronic P104 in water was analyzed by a FTIR spectroscopic method. The appearance of the symmetric deformation band of the anhydrous methyl groups at temperature below the CMT indicates the existence of a hydrophobic microenvironment. The appearance of the symmetric deformation band of the hydrated methyl groups at higher temperatures indicates that the micellar core must contain some amount of water. The results of FTIR data show that the proportion of the anhydrous methyl groups increases and water content in the micellar core decreases during the micellization process. (C) 2002 Elsevier Science (USA). |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | ANGLE NEUTRON-SCATTERING ; TEMPERATURE-DEPENDENT MICELLIZATION ; OXIDE) TRIBLOCK COPOLYMERS ; POLY(ETHYLENE OXIDE) ; AQUEOUS-SOLUTION ; PHASE-BEHAVIOR ; MICELLE FORMATION ; AGGREGATION BEHAVIOR ; LATTICE THEORY ; WATER |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000176810100024 |
| 公开日期 | 2013-11-12 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5644]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Young Scientist Lab Separat Sci & Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, YL,Wang, J,Liu, HZ. Melt, hydration, and micellization of the PEO-PPO-PEO block copolymer studied by FTIR spectroscopy[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2002,251(2):417-423. |
| APA | Su, YL,Wang, J,&Liu, HZ.(2002).Melt, hydration, and micellization of the PEO-PPO-PEO block copolymer studied by FTIR spectroscopy.JOURNAL OF COLLOID AND INTERFACE SCIENCE,251(2),417-423. |
| MLA | Su, YL,et al."Melt, hydration, and micellization of the PEO-PPO-PEO block copolymer studied by FTIR spectroscopy".JOURNAL OF COLLOID AND INTERFACE SCIENCE 251.2(2002):417-423. |
入库方式： OAI收割
来源：过程工程研究所
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