Abstract
The uniaxial stretching and the stress relaxation measurements were carried out for κ-carrageenan hydrogels prepared at different gelation concentration (c0). The Young’s modulus (E) for the gel with low c0 was greater than that for the gel with high c0. Significant difference also appeared in the stress relaxation behavior: the gel with low c0 showed greater and slower stress reduction. The results were explained by the specific network structure of κ-carrageenan hydrogels, where the crosslinks are composed of aggregates of κ-carrageenan chains. It was proposed that a great number of small crosslinks are generated at low c0 including imperfect fragile crosslinks and that the weak crosslink domains disappear accompanying the uniaxial stretching of the gel. It seemed that the dissociation occurs successively under the tensile stress and contributes to the stress relaxation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Society of Materials Science, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
