Journal
MACROMOLECULES
Volume 52, Issue 24, Pages 9613-9619Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.9b01654
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Funding
- Japan Society for the Promotion of Science (JSPS) [19J22561, 19K14672, 18H02027, 16H06312]
- Japan Science and Technology Agency (JST) CREST Grant [JPMJCR1992]
- Japan Science and Technology Agency (JST) COI Grant [JPMJCE1304]
- Grants-in-Aid for Scientific Research [19J22561, 19K14672, 18H02027, 16H06312] Funding Source: KAKEN
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Dynamics of a polymer gel network is described by the theory proposed by Tanaka, Hocker, and Benedek (THB) that gives the diffusion coefficient of a polymer network (D = K +4/3G/f). Here, K is the osmotic bulk modulus, G is the shear modulus, and f is the friction coefficient between the polymer network and the solvent. Although several experimental studies investigated the dynamics of a polymer gel network, the THB theory has yet to be quantitatively validated. In this study, we quantitatively validate the THB theory by comparing D and G of Tetra-poly(ethylene glycol) gels measured by dynamic light scattering and dynamic viscoelastic measurement. The THB theory well described the linear increase in D with increasing G and gave K and f from the slope and the intercept. The gel network structural parameter dependences of the given K and f were -well explained by the scaling laws. These results suggest that the THB theory is almost valid.
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