Effect of ion bombardment on the optical properties of LDPE/EPDM polymer blends

被引：45

作者：

Rizk, R. A. M. ^{[1
]}

Abdul-Kader, A. M. ^{[1
]}

Ali, Z. I. ^{[2
]}

Ali, M. ^{[1
]}

机构：

[1] Helwan Univ, Fac Sci, Dept Phys, Cairo, Egypt

[2] Natl Ctr Radiat Res & Technol, Cairo, Egypt

来源：

VACUUM | 2009年 / 83卷 / 05期

关键词：

Polymer blend; Ion bombardment; Surface modification; Optical energy gap; Activation energy; STRUCTURAL MODIFICATION; ELECTRON; HYDROGEN; FILMS;

D O I：

10.1016/j.vacuum.2008.07.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ion bombardment is a suitable tool to improve the physical properties of polymers. In the present study, the effect of ion bombardment on the optical properties of low density polyethylene (LDPE)/Ethylene propylene diene monomer (EPDM) blend (LDPE/EPDM) was studied. Polymer samples was bombarded with 130 keV He and 320 keV Ar ions at fluencies levels ranging from 1 x 10(13) to 2 x 10(16) ions/cm(2). The untreated and ion beam bombarded samples were investigated using ultraviolet-visible (UV-Vis) spectrophotometry. The optical band gap (E-g), was decreased from similar to 2.9 eV for the pristine sample down to 1.7 eV for the samples bombarded with He and At ions at the highest fluences. Change in the optical gap indicates the presence of a gradual phase transition for the polymer blends. Activation energy has been investigated as a function of the ion fluences. With increasing ion fluence, a decrease in both the energy gap and the activation energy was observed. The number of carbon atoms (N) in a formed cluster is determined according to the modified Tauc's equation. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：805 / 808

页数：4

共 26 条

[1] Changes in the optical energy gap and ESR spectra of proton-irradiated unplasticized PVC copolymer and its possible use in radiation dosimetry [J].