The degree of polymer crystallinity and water content on the surfaces and in the bulk of poly(vinyl alcohol) (PVA) cryogels prepared from aqueous salt solutions were determined as functions of KCl concentration using FTIR-ATR spectroscopy. It was found that the degree of PVA crystallinity increased with increasing KCl concentration and was much greater in the cryogel bulk than on its surfaces. Addition of salt at a concentration of 1.3 M increased the degree of polymer crystallinity on the cryogel surfaces by 1.6–2.3 times whereas the crystallinity in the bulk increased by 3.3–4 times. The cryogel water contents on the surfaces and in the bulk were approximately equal and were practically independent of the salt concentration.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 82, No. 1, pp. 44–49, January–February, 2015.
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Tretinnikov, O.N., Sushko, N.I. & Zagorskaya, S.A. Effect of Salt Concentration on the Structure of Poly(Vinyl Alcohol) Cryogels Obtained from Aqueous Salt Solutions. J Appl Spectrosc 82, 40–45 (2015). https://doi.org/10.1007/s10812-015-0061-8
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DOI: https://doi.org/10.1007/s10812-015-0061-8