Phase transition and elasticity of protein-based hydrogels.

Phase transition and elasticity of protein-based hydrogels. Research Abstract Details 

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Phase transition and elasticity of protein-based hydrogels. Abstract Text:

J Lee,C W Macosko,D W Urry,

Reported are specific materials characterizations of three protein-based polymers comprised of repeating pentapeptide sequences, namely (GVGVP)251, (GVGIP)260 and (GVGVP GVGVP GEGVP GVGVP GVGVP GVGVP)n](GVGVP) where G = glycine, V = valine, P = proline, I = isoleucine, and E = glutamic acid, which had been previously prepared and gamma-irradiation cross-linked into elastic matrices. These polymers exhibit a hydrophobic folding and assembling transition on raising the temperature above a critical temperature, designated by Tt. Their equilibrium swelling ratio, uniaxial tensile and dynamic shear behavior were studied. The effect of the transition on swelling and mechanical properties was demonstrated. Equilibrium swelling ratio below the transition temperature decreased with the increase of gamma-irradiation dose. Above the transition temperature, hysteresis and frequency dependence were found in tensile loading-unloading tests and dynamic shear measurements, respectively. The rubber elasticity theory of random chain networks was applied to the data only below the transition temperature, where they may properly be considered random network hydrogels, to estimate molecular weight between cross-links and the Flory-Huggins interaction parameter.

Phase transition and elasticity of protein-based hydrogels. Publishing Authors By Initials

J Lee,CW Macosko,DW Urry,

For similar natural sciences: physics: thermodynamics research abstracts see: natural sciences: physics: thermodynamics research

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Phase transition and elasticity of protein-based hydrogels. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Journal of biomaterials science. Polymer edition

VOLUME: 12

Page Numbers: 229-42

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ISSN: 0920-5063

DAY: 20

MONTH: 02

YEAR: 2001

Phase transition and elasticity of protein-based hydrogels. Information

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LANGUAGE: eng

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Phase transition and elasticity of protein-based hydrogels. Keywords Mesh Terms:

KEYWORDS: Thermodynamics

MESH TERMS: chemistry

Chemical & Substance for Abstract: Phase transition and elasticity of protein-based hydrogels. Information

Substance Name: Proteins

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Grant and Affiliation Information for Phase transition and elasticity of protein-based hydrogels.

AFFILIATION: Chemical Engineering and Materials Science, The University of Minnesota, Minneapolis 55455, USA. jong@cems.umn.edu

Country: Netherlands

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MEDLINETA: J Biomater Sci Polym Ed

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