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Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments

This study concerns green thermoplastic polyurethanes (TPU) obtained by controlling the chemical structure of flexible segments. Two types of bio-based polyether polyols—poly(trimethylene glycol)s—with average molecular weights ca. 1000 and 2700 Da were used (PO3G1000 and PO3G2700, respectively). TP...

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Autores principales: Kasprzyk, Paulina, Głowińska, Ewa, Parcheta-Szwindowska, Paulina, Rohde, Kamila, Datta, Janusz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8305971/
https://www.ncbi.nlm.nih.gov/pubmed/34299058
http://dx.doi.org/10.3390/ijms22147438
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author Kasprzyk, Paulina
Głowińska, Ewa
Parcheta-Szwindowska, Paulina
Rohde, Kamila
Datta, Janusz
author_facet Kasprzyk, Paulina
Głowińska, Ewa
Parcheta-Szwindowska, Paulina
Rohde, Kamila
Datta, Janusz
author_sort Kasprzyk, Paulina
collection PubMed
description This study concerns green thermoplastic polyurethanes (TPU) obtained by controlling the chemical structure of flexible segments. Two types of bio-based polyether polyols—poly(trimethylene glycol)s—with average molecular weights ca. 1000 and 2700 Da were used (PO3G1000 and PO3G2700, respectively). TPUs were prepared via a two-step method. Hard segments consisted of 4,4′-diphenylmethane diisocyanates and the bio-based 1,4-butanodiol (used as a chain extender and used to control the [NCO]/[OH] molar ratio). The impacts of the structure of flexible segments, the amount of each type of prepolymer, and the [NCO]/[OH] molar ratio on the chemical structure and selected properties of the TPUs were verified. By regulating the number of flexible segments of a given type, different selected properties of TPU materials were obtained. Thermal analysis confirmed the high thermal stability of the prepared materials and revealed that TPUs based on a higher amount of prepolymer synthesized from PO3G2700 have a tendency for cold crystallization. An increase in the amount of PO3G1000 at the flexible segments caused an increase in the tensile strength and decrease in the elongation at break. Melt flow index results demonstrated that the increase in the amount of prepolymer based on PO3G1000 resulted in TPUs favorable in terms of machining.
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spelling pubmed-83059712021-07-25 Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments Kasprzyk, Paulina Głowińska, Ewa Parcheta-Szwindowska, Paulina Rohde, Kamila Datta, Janusz Int J Mol Sci Article This study concerns green thermoplastic polyurethanes (TPU) obtained by controlling the chemical structure of flexible segments. Two types of bio-based polyether polyols—poly(trimethylene glycol)s—with average molecular weights ca. 1000 and 2700 Da were used (PO3G1000 and PO3G2700, respectively). TPUs were prepared via a two-step method. Hard segments consisted of 4,4′-diphenylmethane diisocyanates and the bio-based 1,4-butanodiol (used as a chain extender and used to control the [NCO]/[OH] molar ratio). The impacts of the structure of flexible segments, the amount of each type of prepolymer, and the [NCO]/[OH] molar ratio on the chemical structure and selected properties of the TPUs were verified. By regulating the number of flexible segments of a given type, different selected properties of TPU materials were obtained. Thermal analysis confirmed the high thermal stability of the prepared materials and revealed that TPUs based on a higher amount of prepolymer synthesized from PO3G2700 have a tendency for cold crystallization. An increase in the amount of PO3G1000 at the flexible segments caused an increase in the tensile strength and decrease in the elongation at break. Melt flow index results demonstrated that the increase in the amount of prepolymer based on PO3G1000 resulted in TPUs favorable in terms of machining. MDPI 2021-07-12 /pmc/articles/PMC8305971/ /pubmed/34299058 http://dx.doi.org/10.3390/ijms22147438 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kasprzyk, Paulina
Głowińska, Ewa
Parcheta-Szwindowska, Paulina
Rohde, Kamila
Datta, Janusz
Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments
title Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments
title_full Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments
title_fullStr Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments
title_full_unstemmed Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments
title_short Green TPUs from Prepolymer Mixtures Designed by Controlling the Chemical Structure of Flexible Segments
title_sort green tpus from prepolymer mixtures designed by controlling the chemical structure of flexible segments
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8305971/
https://www.ncbi.nlm.nih.gov/pubmed/34299058
http://dx.doi.org/10.3390/ijms22147438
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