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Determination of sol-gel-sol phase transition by the test tube inverting method
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Solutions of hydrogel copolymers in deionized water from 5 to 30 wt% were prepared and stored in vials at 4 °C. After 24 h, the vials containing polymer solutions were immersed in a water bath at 5 °C, and the phase transition of polymer solutions was investigated by raising the bath temperature from 5 to 60 °C in increments of 1.0 °C. The phase transition temperature was taken as the first temperature at which the solution did not flow when tilted.
Copyright and License information: The Author(s). ©2016
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
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