POSITRON-ANNIHILATION AND X-RAY-DIFFRACTION STUDIES OF CELLULOSE AND SOME DERIVATIVES

被引：5

作者：

DOYLE, S ^{[1
]}

MALHOTRA, BD ^{[1
]}

PEACOCK, N ^{[1
]}

PETHRICK, RA ^{[1
]}

机构：

[1] UNIV STRATHCLYDE, DEPT PURE & APPL CHEM, FIBRE & TEXT RES UNIT, GLASGOW G1 1XL, SCOTLAND

来源：

BRITISH POLYMER JOURNAL | 1984年 / 16卷 / 01期

关键词：

POLYMERS;

D O I：

10.1002/pi.4980160105

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Positron lifetime measurements are reported over a temperature range from 290 to 380K on cellulose and certain of its derivatives. The lifetime spectra were resolved into three components each attributed to a different mode of positron annihilation in the polymer. The longest lifetime component is associated with the decay of ortho-positronium and is a function of the average cavity distribution in the sample. It is observed that significant differences exist in the lifetimes of positrons in cellulose and its derivatives which can be interpreted as evidence for changes in the free volume distribution in these materials.

引用

页码：15 / 20

页数：6

共 23 条

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