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

Bo Gyu Choi, Youn Soo Sohn, Byeongmoon Jeong

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


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.

Original languageEnglish
Pages (from-to)7715-7718
Number of pages4
JournalJournal of Physical Chemistry B
Issue number27
StatePublished - 12 Jul 2007


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