GAS-TRANSPORT AND SUB-T(G) RELAXATIONS IN UNMODIFIED AND NITRATED POLYARYLETHERSULFONES

被引：9

作者：

KAMPS, KMP ^{[1
]}

TEUNIS, HA ^{[1
]}

WESSLING, M ^{[1
]}

SMOLDERS, CA ^{[1
]}

机构：

[1] UNIV TWENTE,POB 217,7500 AE ENSCHEDE,NETHERLANDS

来源：

JOURNAL OF MEMBRANE SCIENCE | 1992年 / 74卷 / 1-2期

关键词：

GAS AND VAPOR PERMEATION; SOLUBILITY AND PARTITIONING;

D O I：

10.1016/0376-7388(92)87083-A

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Aromatic nitration has been used to modify the polymer main chain of polysulfone and polyethersulfone. Alteration in the gas separation characteristics of homogeneous membranes made out of these polymers could be observed upon nitration. Generally, separation factors for gas mixtures Of CO2/CH4 increased while the permeability decreased. Remarkably, a decreasing diffusivity for both gases upon nitration could not be correlated with an increasing free-volume but was interpreted as an drastically decreased main-chain flexibility. The decrease of main-chain segmental mobility could be verified experimentally by a diminished amount of beta-relaxations determined by torsional braid analysis.

引用

页码：193 / 201

页数：9

共 17 条

[1] SORPTION AND DIFFUSION IN ETHYL CELLULOSE .3. COMPARISON BETWEEN ETHYL CELLULOSE AND RUBBER [J].