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Spectroscopic Study on Water Diffusion in Poly(L-lactide)-Poly(ethylene glycol) Diblock Copolymer Film
Jin, Ying; Wang, Wei; Su, Zhaohui
2011-04-12
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume44Issue:7Pages:2132-2139
AbstractDiffusion of water in a phase-separated poly(L-lactide)-b-poly(ethylene glycol) (PLLA PEG) copolymer with both blocks crystallizable was investigated using time-resolved ATR-FTIR with deuteratecl water and 2D correlation analysis. Water molecules of three different states were identified in the copolymer matrix, and their formation sequence was determined. Perturbation of water on the copolymer structure was revealed. While the amorphous PLLA chains were not affected, upon water penetration, conformation distribution of crystalline PLLA chains was altered, which can be reversed upon removal of the water, and the PEG crystallinity in the copolymer was gradually destroyed and the process was not reversible. For the double amorphous PLLA PEG film, water first associated with the more hydrophilic PEG chains and then interacted with the PLLA segments. For the double crystalline film, however, crystalline PLLA segments were first perturbed by the water before the crystalline PEG was affected. Finally, the water diffusion coefficient for the PLLA PEG copolymer was measured and compared with that of the PLLA and PEG homopolymers.
DOI10.1021/ma200062t
Indexed BySCI
Language英语
WOS IDWOS:000289028500053
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72370
Collection中国科学院化学研究所
Corresponding AuthorSu, Zhaohui
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Jin, Ying,Wang, Wei,Su, Zhaohui. Spectroscopic Study on Water Diffusion in Poly(L-lactide)-Poly(ethylene glycol) Diblock Copolymer Film[J]. MACROMOLECULES,2011,44(7):2132-2139.
APA Jin, Ying,Wang, Wei,&Su, Zhaohui.(2011).Spectroscopic Study on Water Diffusion in Poly(L-lactide)-Poly(ethylene glycol) Diblock Copolymer Film.MACROMOLECULES,44(7),2132-2139.
MLA Jin, Ying,et al."Spectroscopic Study on Water Diffusion in Poly(L-lactide)-Poly(ethylene glycol) Diblock Copolymer Film".MACROMOLECULES 44.7(2011):2132-2139.
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