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Исследование фазовых переходов и термодинамических характеристик поли-4-метилпентена-1

Исследование фазовых переходов и термодинамических характеристик поли-4-метилпентена-1

Abstract

Физико-химическими методами изучены структурные превращения в поли-4-метилпентене-1 (ПМП) в широком интервале значений температуры. Экспериментальное изучение фазовых превращений проведено с помощью комплекса физико-химических методов термический и термомеханический анализ, метод свободных крутильных колебаний, ИК-спектроскопические исследования. Рассмотрены особенности превращений разного рода в зависимости от типа структуры полимера. Установлена возможность перехода гибкоцепного ПМП в мезофазное состояние в преди послерасплавленном состоянии. На основе полученных экспериментальных данных рассчитаны значения термодинамических параметров конформационной подвижности ПМП в течение его фазовых превращений

Structural transformations in poly-4-methylpentene-1 (PMP) within a wide temperature interval are studied by physical and chemical methods. Experimental investigations of phase transformations are carried out using the thermal and thermomechanical analysis, the method of free torsional vibrations, and IR spectroscopy. Features of different-kind transformations depending on a type of polymer structure are discussed. The possibility of the flexible-chain PMP transition to the mesophase state in the preand post-molten condition is ascertained. Values of thermodynamic parameters of the PMP conformation mobility during its phase transformations are calculated on the basis of experimental data

Keywords

МЕМБРАНА, ТЕРМИЧЕСКИЙ АНАЛИЗ, ТЕРМОМЕХАНИЧЕСКИЙ АНАЛИЗ, ФАЗОВЫЙ ПЕРЕХОД, РЕЛАКСАЦИОННЫЙ ПРОЦЕСС, МЕЗОФАЗА, ПОЛИМЕР

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze