Features of the Gas-Permeable Crystalline Phase of Poly-2,6-dimethylphenylene Oxide

• Published in: Polymers Vol. 14; no. 1; p. 120
• Main Authors: Alentiev, Alexander Yu, Levin, Ivan S, Belov, Nikolay A, Nikiforov, Roman Yu, Chirkov, Sergey V, Bezgin, Denis A, Ryzhikh, Victoria E, Kostina, Julia V, Shantarovich, Victor P, Grunin, Leonid Yu
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 29.12.2021; MDPI
• Subjects: Activation energy; Crystal structure; Crystallinity; Fourier transforms; free volume; gas permeability; gas sorption; Gas transport; Gases; Infrared spectroscopy; Lifetime; Magnetic induction; Molecular sieves; NMR; Nuclear magnetic resonance; Organic chemistry; organic molecular sieves; Permeability; poly-2,6-dimethylphenylene oxide; Polymer films; Polymers; Positron annihilation; semi-crystalline polymers; Spectrum analysis; Thermodynamic properties; Russia; poly-2,6-dimethylphenylene oxide; free volume; gas permeability; organic molecular sieves; semi-crystalline polymers; gas sorption

Poly-2,6-dimethylphenylene oxide (PPO) film samples with varying degrees of crystallinity (from 0 to 69%) were obtained by means of different techniques. The films were studied by various physicochemical methods (Fourier-transform infrared spectroscopy, positron annihilation lifetime spectroscopy, X...