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Influence of the solvent on the segmental dynamics and structure in mixed compositions of polyurethane and styrene-acrylonitrile copolymer

Наименование публикации:Influence of the solvent on the segmental dynamics and structure in mixed compositions of polyurethane and styrene-acrylonitrile copolymerАвторы:Попов А. А. 
Karpova S.G., Naumova Yu.A., Lukanina Yu.K., Lyusova L.P., Groshanova S.S.
Тематическая область:Химия
Вид публикации:Статья в журнале
Электронная публикация:НетЯзык издания:АнглийскийГод издания:2014Страна издания: Россия Наименование журнала или сборника:Russian Journal of Physical Chemistry BНомер журнала (с указанием года):Volume 8, Issue 3, May 2014Наименование издательства:Maik Nauka Publishing / Springer SBMКод ISSN или ISBN:1990-7931Количество страниц:5Количество печатных листов:0,625Издание:Издание перечня ВАКИндексация:Scopus,
Web of Science
Библиографическая ссылка:Russian Journal of Physical Chemistry B : Vol. 8, Issue 3, May 2014Аннотация (реферат):

​The effect of the tetrahydrofuran (THF), methyl ethyl ketone (MEK), ethyl acetate (EA), and acetone (A) solvents on the structure and segmental dynamics of polyurethane (PU)-(styrene-acrylonitrile) (SAN) mixed compositions are studied by spin-probe EPR spectroscopy, differential scanning calorimetry, and infrared spectroscopy. The molecular mobility τ, the degree of crystallinity χ, the modulus of elasticity E alter only slightly in passing from 100% PU to a 50% PU-50% SAN, but the structural and dynamic properties change abruptly at a high SAN content in the composition, regardless of the type of solvent. The values of τ, χ, and elastic modulus for the mixed compositions increases depending on the type of solvent in the following sequence: THF, MEK, EA, A, which can be explained by the thermodynamic affinity between the solvent and solute. It is also shown that, with growing content of SAN in the composition, the number of intermolecular hydrogen bonds between nitrile and urethane groups (3344-cm-1 band) increases.


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