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. 2018 Jan 26;10(2):128. doi: 10.3390/polym10020128

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Equilibrium swelling ratio of cotton fabric grafted alginate-Ca²⁺/P(NIPAAm-co-EGMA₃₆₀) hydrogels as a function of temperature in water. (b) First derivatives of the equilibrium swelling ratios with respect to the temperature plotted as a function of temperature. The monomer ratios of NIPAAm to EGMA₃₆₀ are 20:0, 19.5:0.5, and 18.5:1.5.