Section 10
Chapter 9,522

Temperature dependence of the elastic modulus of alginate gels

Moe, S.T.; Draget, K.I.; Skjak Braek, G.; Smidsrod, O.

Carbohydrate Polymers 19(4): 279-284


ISSN/ISBN: 0144-8617
DOI: 10.1016/0144-8617(92)90081-z
Accession: 009521605

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The temperature dependence of the elastic modulus for alginate gels was studied using two different gel systems: covalently corsslinked Na-alginate gels and in-situ prepared Ca-alginate gels. The modulus of physically crosslinked gels showed a complex behaviour. The temperature coefficient of the modulus of covalently crosslink gels changed from positive for the lowest crosslinked gels to negative for the highest crosslinked gels. This suggests a change from rubberlike to enthalpy-driven elasticity with an increasing degree of crosslinking for these gel networks.

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