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Melt, hydration, and micellization of the PEO-PPO-PEO block copolymer studied by FTIR spectroscopy
Alternative TitleJ. Colloid Interface Sci.
Su, YL; Wang, J; Liu, HZ
2002-07-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume251Issue:2Pages:417-423
AbstractFourier 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).; 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).
KeywordPeo-ppo-peo Block Copolymer Melt Hydration Micellization Ftir
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1006/jcis.2002.8435
URL查看原文
Indexed BySCI
Language英语
WOS KeywordANGLE NEUTRON-SCATTERING ; TEMPERATURE-DEPENDENT MICELLIZATION ; OXIDE) TRIBLOCK COPOLYMERS ; POLY(ETHYLENE OXIDE) ; AQUEOUS-SOLUTION ; PHASE-BEHAVIOR ; MICELLE FORMATION ; AGGREGATION BEHAVIOR ; LATTICE THEORY ; WATER
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000176810100024
Citation statistics
Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5644
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Young Scientist Lab Separat Sci & Engn, Beijing 100080, Peoples R China
Recommended Citation
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.
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