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. 2021 Feb 2;12:746. doi: 10.1038/s41467-021-21024-7

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Frequency-dependent linear rheometry (ω = 0.1–20 rad/s) of PSNP/HPMC-C₁₂ PNP networks. b Strain-dependent rheometry (γ = 1–4000%) of the PNP gel at 12.5 °C, 25 °C, and 37.5 °C. c Normalized loss modulus peaks taken from the yielding point of the amplitude sweeps and fit to a log-normal distribution equation. d The area-under-the-curve of the normalized loss modulus peaks obtained from strain-dependent rheometry (γ = 1–4000%) of the PSNP/HPMC-C₁₂ PNP networks. These area-under-the-curve values are characteristic of the decaging energy of the physical crosslinking interactions and corroborate the predicted temperature-induced strengthening in PSNP/HPMC-C₁₂ PNP networks.