Journal
MACROMOLECULES
Volume 53, Issue 18, Pages 7717-7725Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.0c01427
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Funding
- Japan Society for the Promotion of Science (JSPS) [19J22561, 19K14672, 20K15338, 18H02027, 16H06312]
- Japan Science and Technology Agency (JST) CREST Grant [JPMJCR1992, JPMJCE1304]
- COI Grant [JPMJCE1304]
- Grants-in-Aid for Scientific Research [20K15338, 19J22561, 19K14672] Funding Source: KAKEN
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Because the swelling of polymer gels is a diffusion process of the polymer network, the swelling rate is determined by the diffusion coefficient of a polymer network. The diffusion coefficient (D) includes the polymer-solvent mixing contribution (D-mix) and the elastic contribution from the polymer network (D-el). In this study, we experimentally investigate D, D-mix, and D-el, using tetra gels whose network structural parameters are systematically controllable. We measured D and the shear modulus (G) using dynamic light scattering and dynamic viscoelastic measurement, respectively. According to the Tanaka-Fillmore theory, we evaluate D-mix and D-el using the linear relationship between D and G in the as-prepared state. Consequently, we demonstrate a relation of D = D-mix + D-el in the as-prepared, swelling, and equilibrium swollen states.
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