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Closed-loop sol-gel transition of PEG-PEC aqueous solution

Title
Closed-loop sol-gel transition of PEG-PEC aqueous solution
Authors
Choi B.G.Sohn Y.S.Jeong B.
Ewha Authors
손연수정병문
SCOPUS Author ID
손연수scopus; 정병문scopus
Issue Date
2007
Journal Title
Journal of Physical Chemistry B
ISSN
1520-6106JCR Link
Citation
vol. 111, no. 27, pp. 7715 - 7718
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We are reporting an unusual closed-loop phase behavior of polyethylene glycol)-β-poly(ethyl-2-cyanoacrylate) (PEG-PEC) aqueous solutions. As the temperature increased from 0 to 60°C, the aqueous polymer solution (12 wt %) underwent sol-to-gel and gel-to-syneresis transitions. However, the polymer aqueous solution persisted as a sol phase below 4.0 wt % as well as above 16 wt % in the same temperature range, thus forming a closed-loop gel domain in the phase diagram. The closed-loop gel domain is suggested to be a result of the balance between the aggregation and the stabilization of micelles in specific temperature and concentration ranges. © 2007 American Chemical Society.
DOI
10.1021/jp072970f
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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