Gas transport parameters, density and free volume of nanocrystalline poly-2,6-dimethylphenylene oxide

被引：32

作者：

Alentiev, A. Yu ^{[1
]}

Levin, I. S. ^{[1
]}

Buzin, M. I. ^{[2
]}

Belov, N. A. ^{[1
]}

Nikiforov, R. Yu ^{[1
]}

Chirkov, S. V. ^{[1
]}

Blagodatskikh, I. V. ^{[2
]}

Kechekyan, A. S. ^{[3
]}

Kechekyan, P. A. ^{[3
]}

Bekeshev, V. G. ^{[4
]}

Ryzhikh, V. E. ^{[1
]}

Yampolskii, Yu. P. ^{[1
]}

机构：

[1] RAS, AV Topchiev Inst Petrochem Synth, Moscow, Russia

[2] RAS, AN N Nesmeyanov Inst Organoelement Cpds, Moscow, Russia

[3] RAS, NS Enikolopov Inst Synthet Polymer Mat, Moscow, Russia

[4] RAS, NN Semenov Fed Res Ctr Chem Phys, Moscow, Russia

来源：

POLYMER | 2021年 / 226卷

基金：

俄罗斯科学基金会;

关键词：

Semi-crystalline polymers; poly(phenylene oxide); NANOPOROUS-CRYSTALLINE; POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE); THERMODYNAMIC PROPERTIES; SURFACE FLUORINATION; COMPOSITE MEMBRANES; PERMEABILITY; SORPTION; PPO; PERMEATION; MODELS;

D O I：

10.1016/j.polymer.2021.123804

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(2,6-dimethylphenylene oxide-1,4) (PPO) belongs to a fairly investigated group of polymers that, nevertheless, provokes permanent research interest. The current study is focused on a combination of various physicochemical methods of polymer testing (DSC; molecular weight distribution; surface area by low-temperature adsorption isotherms of nitrogen and carbon dioxide; X-Ray diffraction analysis; hydrostatic measurement of density; gas permeability and diffusion measurement) with variation of molecular weight and different states of polymer samples (amorphous, semi-crystalline, biaxial-oriented). The alteration of the density, gas permeability and diffusion parameters is evaluated through modeling of PPO as a polymer-polymer blend material with amorphous, nano-sized crystalline (<= 7 nm), and so-called rigid amorphous fraction (RAF) phases. The estimation of the phase properties of PPO samples allows to conclude that the permeability and diffusion characteristics decline in a row crystalline > amorphous > RAF.

引用

页数：11

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