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...
Autores principales: | , , , , |
---|---|
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 |