Poly(etherimide)s: correlation of positron annihilation lifetime studies with polymer structure and gas permeability

被引：22

作者：

Eastmond, GC

Daly, JH

McKinnon, AS

Pethrick, RA

机构：

[1] Univ Liverpool, Dept Chem, Liverpool L69 3BX, Merseyside, England

[2] Univ Strathclyde, Dept Pure & Appl Chem, Glasgow G1 1XL, Lanark, Scotland

来源：

POLYMER | 1999年 / 40卷 / 12期

关键词：

poly(ether imide); positron annihilation lifetime measurements; gas permeability;

D O I：

10.1016/S0032-3861(98)00539-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This paper describes the results of positron annihilation lifetime measurements on a series of poly(ether imide)s for which permeabilities and permselectivities for gas separation have been determined previously. Positron lifetimes and intensities vary systematically with changes in polymer structure and correlate with the permeabilities in separation of carbon dioxide and methane. Some apparent scatter in the data might, in part, be associated with differences in the interactions of ortho-positronium with molecular cavities as polymer structures are varied. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：3605 / 3610

页数：6

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