FREE-VOLUME MEAN SIZES OF POLYMERS PROBED BY POSITRON-ANNIHILATION SPECTROSCOPY - A CORRELATION OF RESULTS OBTAINED BY PAL AND BY ACAR METHODS

被引：19

作者：

JEAN, YC

机构：

[1] Department of Chemistry, University of Missouri-Kansas City, Kansas City

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1991年 / 56-7卷 / pt 1期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0168-583X(91)96108-W

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Positron annihilation spectroscopy (PAS) has been developed to analyze the microstructure of polymers. Both positron annihilation lifetime (PAL) and angular correlation of positron annihilation radiation (ACAR) measurements give direct information about the mean hole sizes of free-volume holes in amorphous materials. Parallel experiments of PAL and ACAR have been performed in an epoxy polymer as a function of temperature. The free-volume mean hole radii ranging from 2.3 to 3.2 angstrom are obtained. The results obtained by PAL and ACAR agree with each other very well. A correlation of mean free-volume hole sizes obtained by these two methods is established.

引用

页码：615 / 617

页数：3

共 9 条

[1]

Brandt W., 1983, POSITRON SOLID STATE

[2] ANISOTROPY OF FREE-VOLUME-HOLE DIMENSIONS IN POLYMERS PROBED BY POSITRON-ANNIHILATION SPECTROSCOPY [J].