Free volume study of 70 MeV carbon induced modification in polymers through positron annihilation

被引：18
作者：
Kumar, R [1 ]
Ali, SA
Mahur, AK
Das, D
Naqvi, AH
Virk, HS
Prasad, R
机构：
[1] Aligarh Muslim Univ, Dept Appl Phys, ZH Coll Engn & Technol, Aligarh 202002, Uttar Pradesh, India
[2] UGC, DAE Consortium Sci Res, Kolkata 700098, India
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2006年 / 244卷 / 01期
关键词：
CR-39(DOP) polycarbonate; PN-6; polymer; C5+ ion irradiation; positron lifetime; ion beam modification; free volume hole;
D O I：
10.1016/j.nimb.2005.11.135
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Free volume properties of polymers have strong correlation with macroscopic properties and can be modified by radiations and ions. Positron annihilation lifetime spectroscopy (PALS) provide direct information about the dimension, content and size distribution of free volume holes in polymers. CR-39 (DOP), a polycarbonate widely used as ion track detector and polyamide Nylon-6, a high performance plastic having a unique combination of superior mechanical, electrical, chemical and thermal properties were irradiated with 70 MeV C5+ ion beam to different fluences ranging from 10(11) to 3.7 x 10(13) ions/cm(2). The results of characterization by PALS are reported here. o-Ps lifetime and the average free volume for both the polymers are found to decrease with fluence, indicating the facilitation of cross-linking. The results are interpreted in terms of change in the free volume. Maximum change of 9.7% in average free volume was observed in PN-6 irradiated to 3.7 x 10(13) ions/cm(2). (c) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：257 / 260
页数：4
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