Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane

Abstract The strain-induced softening of thermoplastic polyurethane elastomers (TPUs), known as the Mullins effect, arises from their multi-phase structure. We used the combination of small- and wide- angle X-ray scattering (SAXS/WAXS) during in situ repeated tensile loading to elucidate the relatio...

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Autores principales:	T. Sui, E. Salvati, S. Ying, G. Sun, I. P. Dolbnya, K. Dragnevski, C. Prisacariu, A. M. Korsunsky
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3b82f2d78a524120886e3447aefdd752
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spelling	oai:doaj.org-article:3b82f2d78a524120886e3447aefdd7522021-12-02T16:06:21ZStrain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane10.1038/s41598-017-00904-32045-2322https://doaj.org/article/3b82f2d78a524120886e3447aefdd7522017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00904-3https://doaj.org/toc/2045-2322Abstract The strain-induced softening of thermoplastic polyurethane elastomers (TPUs), known as the Mullins effect, arises from their multi-phase structure. We used the combination of small- and wide- angle X-ray scattering (SAXS/WAXS) during in situ repeated tensile loading to elucidate the relationship between molecular architecture, nano-strain, and macro-scale mechanical properties. Insights obtained from our analysis highlight the importance of the ‘fuzzy interface’ between the hard and soft regions that governs the structure evolution at nanometre length scales and leads to macroscopic stiffness reduction. We propose a hierarchical Eshelby inclusion model of phase interaction mediated by the ‘fuzzy interface’ that accommodates the nano-strain gradient between hard and soft regions and undergoes tension-induced softening, causing the Mullins effect that becomes apparent in TPUs even at moderate tensile strains.T. SuiE. SalvatiS. YingG. SunI. P. DolbnyaK. DragnevskiC. PrisacariuA. M. KorsunskyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q T. Sui E. Salvati S. Ying G. Sun I. P. Dolbnya K. Dragnevski C. Prisacariu A. M. Korsunsky Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane
description	Abstract The strain-induced softening of thermoplastic polyurethane elastomers (TPUs), known as the Mullins effect, arises from their multi-phase structure. We used the combination of small- and wide- angle X-ray scattering (SAXS/WAXS) during in situ repeated tensile loading to elucidate the relationship between molecular architecture, nano-strain, and macro-scale mechanical properties. Insights obtained from our analysis highlight the importance of the ‘fuzzy interface’ between the hard and soft regions that governs the structure evolution at nanometre length scales and leads to macroscopic stiffness reduction. We propose a hierarchical Eshelby inclusion model of phase interaction mediated by the ‘fuzzy interface’ that accommodates the nano-strain gradient between hard and soft regions and undergoes tension-induced softening, causing the Mullins effect that becomes apparent in TPUs even at moderate tensile strains.
format	article
author	T. Sui E. Salvati S. Ying G. Sun I. P. Dolbnya K. Dragnevski C. Prisacariu A. M. Korsunsky
author_facet	T. Sui E. Salvati S. Ying G. Sun I. P. Dolbnya K. Dragnevski C. Prisacariu A. M. Korsunsky
author_sort	T. Sui
title	Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane
title_short	Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane
title_full	Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane
title_fullStr	Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane
title_full_unstemmed	Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane
title_sort	strain softening of nano-scale fuzzy interfaces causes mullins effect in thermoplastic polyurethane
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3b82f2d78a524120886e3447aefdd752
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_version_	1718385016706170880

Strain softening of nano-scale fuzzy interfaces causes Mullins effect in thermoplastic polyurethane

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