On the Necking Phenomenon in Pseudo-Semi-Interpenetrating Double-Network Hydrogels

On the Necking Phenomenon in Pseudo-Semi-Interpenetrating Double-Network Hydrogels

A detailed physical picture of necking phenomenon in semi-interpenetrating double-network (SIDN) hydrogels was developed using the tensile mechanics of DN hydrogels synthesized from 3-sulfopropyl acrylate potassium salt (SAPS) and acrylamide (AAm) with different molecular weights. Uniaxial tensile t...

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Veröffentlicht in:Macromolecules 2013-08, Vol.46 (15), p.6203-6208
Hauptverfasser: Es-haghi, S. Shams, Leonov, A. I, Weiss, R. A
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Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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container_title Macromolecules
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creator Es-haghi, S. Shams
Leonov, A. I
Weiss, R. A
description A detailed physical picture of necking phenomenon in semi-interpenetrating double-network (SIDN) hydrogels was developed using the tensile mechanics of DN hydrogels synthesized from 3-sulfopropyl acrylate potassium salt (SAPS) and acrylamide (AAm) with different molecular weights. Uniaxial tensile tests for DN hydrogels already damaged by a compression load demonstrated the necking required a first network with a brittle structure. Although necking originates from the brittle nature of the first network, the molecular weight of polymer chains of the second network is an important factor for neck propagation. The finite deformation of DN hydrogels is characterized by two regimes of deformation: one where the neck initiates and a second where it propagates.
doi_str_mv 10.1021/ma4007494
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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
title On the Necking Phenomenon in Pseudo-Semi-Interpenetrating Double-Network Hydrogels
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