Correlation between hardness and elastic properties of acrylamide based hydrogels prepared by radiation induced polymerization

Mahmudi, Naim and Syla, Naim and Aliaj, Fisnik and Rendevski, Stojan (2018) Correlation between hardness and elastic properties of acrylamide based hydrogels prepared by radiation induced polymerization. Journal of Natural Sciences and Mathematics of UT, 3 (5-6). pp. 232-237. ISSN 2671-3039

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Abstract

In the present work, correlation between hardness and elastic properties of acrylamide-based hydrogels prepared by gamma-induced irradiation have been investigated. Poly(acrylamide/methacrylamide) P(AAm/MAAm) and poly(acrylamide/hydroxyethyl methacrylate) P(AAm/HEMA) hydrogels with various composition were prepared by gamma irradiation and used as model hydrogel systems. There was determined the swelling kinetics, such as swelling ratio ks, transport exponent n, diffusion coefficient D and diffusion constant k related to the structure of polymer crosslinked network. The uniaxial compression was applied to cylindrical gel samples in the swollen form at pH 7 by using the Universal Testing Instrument. The molecular weight between crosslinks and the effective cross-link density of hydrogels e were calculated from swelling, while shear modulus data were obtained from compression tests. A comparative analysis between the cross-link density e or average molecular weight of hydrogels by using swelling tests and mechanical measurements has been made. Results have shown that simple compression analyses can be used for the determination of the effective cross-link density of hydrogels e without the need for some polymer-solvent based parameters as in the case of swelling based determinations. The hardness of polymer samples was determined by the Vickers method and correlation between these values and shear modulus was discussed.

Item Type:	Article
Subjects:	Q Science > Q Science (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User:	Unnamed user with email zshi@unite.edu.mk
Date Deposited:	05 Jun 2019 08:35
Last Modified:	05 Jun 2019 08:35
URI:	http://eprints.unite.edu.mk/id/eprint/167

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