Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/15116
Title: Optical and structural study of aromatic polymers irradiated by gamma radiation
Authors: Ahmed, Bashir
Raghuvanshi, S K
Siddhartha
Srivastava, A K
Krishna, J B M
Wahab, M A
Keywords: Gamma irradiation
Kapton
PES
XRD
UV-VIS spectroscopy
Issue Date: Dec-2012
Publisher: NISCAIR-CSIR, India
Abstract: Aromatic polymers have proven their potential in the field of electronics, space and nuclear technology. Aromatic polymers have been found to have very good electrical properties, mechanical strength and high melting points (260<span style="font-family:Symbol;mso-ascii-font-family:" times="" new="" roman";="" mso-hansi-font-family:"times="" roman";mso-char-type:symbol;mso-symbol-font-family:="" symbol"="" lang="EN-GB">°C to 350<span style="font-family:Symbol; mso-ascii-font-family:" times="" new="" roman";mso-hansi-font-family:"times="" roman";="" mso-char-type:symbol;mso-symbol-font-family:symbol"="" lang="EN-GB">°C) due to the presence of aromatic ring in the polymer back bone. In the present paper, the optical and structural properties of virgin and high dose (500-2000 kGy) <img src='/image/spc_char/gamma2.gif' border=0>-irradiated samples of aromatic polymers such as kapton and PES have been studied. These polymer samples were analyzed by using UV-Visible spectrophotometer in the wavelength range 190-900 nm. From the optical spectrum, we found that the absorption and optical band gaps (<i style="mso-bidi-font-style:normal">E</i><sub>g</sub>) of virgin and irradiated kapton and PES polymer samples decrease with increasing dose. The existence of the maximum absorption, their shifting and broadening due to gamma irradiation have been investigated. The structural studies have been done by using X-ray diffractometry (XRD) analysis. The diffraction pattern of kapton and PES polymers indicates recrystallization and increase in the crystallinity with increasing dose. </span></span>
Description: 892-898
URI: http://hdl.handle.net/123456789/15116
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.50(12) [December 2012]

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