Positron annihilation studies on radiation-crosslinked poly(N-isopropylacrylamide) hydrogels

被引：0
|
作者：
Panda, A
Sodaye, HS
Acharya, RN
Goswami, A
Pujari, PK
Sabharwal, S
Manohar, SB [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Desalinat Div, Bombay 400085, Maharashtra, India
[3] Bhabha Atom Res Ctr, Radiat Technol Dev Sect, Bombay 400085, Maharashtra, India
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2000年 / 38卷 / 19期
关键词：
poly(N-isopropylacrylamide) hydrogel; positron annihilation; orthopositronium lifetime and intensity; free-volume hole size distribution;
D O I：
10.1002/1099-0518(20001001)38:19<3462::AID-POLA20>3.0.CO;2-I
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The temperature-sensitive poly(N-isopropylacrylamide) hydrogels, prepared by gamma and electron-beam (EB) irradiation, were studied using positron annihilation lifetime spectroscopy (PALS). The effect of water content in the hydrogel on the ortho-positronium (o-Ps) lifetime and intensity was investigated. The observed positronium lifetime suggests microstructural differences between gamma- and EB-synthesized hydrogels. The distribution in positronium lifetime indicates nonhomogeneity in the distribution of free-volume holes in EB-synthesized hydrogels. (C) 2000 John Wiley & Sons, Inc.
引用
收藏
页码：3462 / 3466
页数：5
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