Some of the existing definitions of the term ‘gel’ are discussed and shortcomings are identified. A purely phenomenological definition is proposed: a gel is a soft, solid or solid‐like material consisting of two or more components one of which is a liquid, present in substantial quantity. ‘Solid‐like gels’ are further defined in terms of the dynamic mechanical properties.
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Almdal et al. (1993) studied this question.
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