Microstructural studies of electron beam-irradiated cellulose pulp

被引：35

作者：

Dubey, KA

Pujari, PK

Ramnani, SP

Kadam, RM

Sabharwal, S ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Radiat Technol Dev Sect, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India

来源：

RADIATION PHYSICS AND CHEMISTRY | 2004年 / 69卷 / 05期

关键词：

cellulose; EPR; positron annihilation; EB irradiation; ortho-positronium; free-volume;

D O I：

10.1016/j.radphyschem.2003.07.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of electron beam irradiation on the microstructure Of Cellulose has been investigated using positron annihilation lifetime spectroscopy (PALS) and electron paramagnetic resonance (EPR) Spectroscopy. PALS studies of irradiated cellulose samples showed that ortho-positronium (o-Ps) lifetime increases with ail increase in dose up to 80 kGy and decreases at higher doses. The EPR signal of the irradiated cellulose matrix showed the presence Of Multiple radical sites. These results are discussed on the basis of chemical and physical changes Occurring at the microscopic level in the Cellulose due to irradiation. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：395 / 400

页数：6

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