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. 2021 Jan 28;13(3):417. doi: 10.3390/polym13030417

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Comparison of confinement length scale with correction length of confining PMMA in PC/PMMA multilayers. (b) Activation plots of segmental α-relaxation time (τ_α) for PC/PMMA multilayers and bulk PMMA. (c) Number of correlated units (N_c) versus the α-relaxation time for bulk and nanoconfined PMMA samples. Notwithstanding the large changes in N_c due to confinement (inset), the dependence of N_c on τ_α is the same as for the bulk PMMA. Reproduced with permission from Ref. [104]. Copyright (2016) Elsevier.