Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy

A set of aromatic-oxyaliphatic polyurethanes (PUs) with different mass fractions of components also containing fluorinated fragments was synthesized and studied using various solid-state NMR techniques and dielectric spectroscopy. In contrast to the common model suggested by Cooper and Tobolsky in 1...

Descripción completa

Detalles Bibliográficos
Autores principales: Ostanin, Stepan A., Mokeev, Maxim V., Pikhurov, Dmitry V., Sakhatskii, Aleksandr S., Zuev, Vjacheslav V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232235/
https://www.ncbi.nlm.nih.gov/pubmed/34198643
http://dx.doi.org/10.3390/polym13121967
_version_ 1783713593944965120
author Ostanin, Stepan A.
Mokeev, Maxim V.
Pikhurov, Dmitry V.
Sakhatskii, Aleksandr S.
Zuev, Vjacheslav V.
author_facet Ostanin, Stepan A.
Mokeev, Maxim V.
Pikhurov, Dmitry V.
Sakhatskii, Aleksandr S.
Zuev, Vjacheslav V.
author_sort Ostanin, Stepan A.
collection PubMed
description A set of aromatic-oxyaliphatic polyurethanes (PUs) with different mass fractions of components also containing fluorinated fragments was synthesized and studied using various solid-state NMR techniques and dielectric spectroscopy. In contrast to the common model suggested by Cooper and Tobolsky in 1966, the rigid domains of microphase separated PUs are formed, not only by units containing urethane bonds, but also by oxyethylene fragments that form a common rigid phase. The urethane bonds and oxyethylene fragments are incorporated into both rigid and soft phases. Good agreement with the Cooper and Tobolsky model is observed only when solubility parameters are significantly different for the hard and soft segments, such as hydrocarbon aromatics and perfluoroaliphatic blocks.
format Online
Article
Text
id pubmed-8232235
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-82322352021-06-26 Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy Ostanin, Stepan A. Mokeev, Maxim V. Pikhurov, Dmitry V. Sakhatskii, Aleksandr S. Zuev, Vjacheslav V. Polymers (Basel) Article A set of aromatic-oxyaliphatic polyurethanes (PUs) with different mass fractions of components also containing fluorinated fragments was synthesized and studied using various solid-state NMR techniques and dielectric spectroscopy. In contrast to the common model suggested by Cooper and Tobolsky in 1966, the rigid domains of microphase separated PUs are formed, not only by units containing urethane bonds, but also by oxyethylene fragments that form a common rigid phase. The urethane bonds and oxyethylene fragments are incorporated into both rigid and soft phases. Good agreement with the Cooper and Tobolsky model is observed only when solubility parameters are significantly different for the hard and soft segments, such as hydrocarbon aromatics and perfluoroaliphatic blocks. MDPI 2021-06-14 /pmc/articles/PMC8232235/ /pubmed/34198643 http://dx.doi.org/10.3390/polym13121967 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
Ostanin, Stepan A.
Mokeev, Maxim V.
Pikhurov, Dmitry V.
Sakhatskii, Aleksandr S.
Zuev, Vjacheslav V.
Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy
title Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy
title_full Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy
title_fullStr Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy
title_full_unstemmed Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy
title_short Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy
title_sort interplay of structural factors in formation of microphase-separated or microphase-mixed structures of polyurethanes revealed by solid-state nmr and dielectric spectroscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232235/
https://www.ncbi.nlm.nih.gov/pubmed/34198643
http://dx.doi.org/10.3390/polym13121967
work_keys_str_mv AT ostaninstepana interplayofstructuralfactorsinformationofmicrophaseseparatedormicrophasemixedstructuresofpolyurethanesrevealedbysolidstatenmranddielectricspectroscopy
AT mokeevmaximv interplayofstructuralfactorsinformationofmicrophaseseparatedormicrophasemixedstructuresofpolyurethanesrevealedbysolidstatenmranddielectricspectroscopy
AT pikhurovdmitryv interplayofstructuralfactorsinformationofmicrophaseseparatedormicrophasemixedstructuresofpolyurethanesrevealedbysolidstatenmranddielectricspectroscopy
AT sakhatskiialeksandrs interplayofstructuralfactorsinformationofmicrophaseseparatedormicrophasemixedstructuresofpolyurethanesrevealedbysolidstatenmranddielectricspectroscopy
AT zuevvjacheslavv interplayofstructuralfactorsinformationofmicrophaseseparatedormicrophasemixedstructuresofpolyurethanesrevealedbysolidstatenmranddielectricspectroscopy