Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif

In this study, the high density polyethylene (HDPE) and low density polyethylene (LDPE) sheets were prepared by compression moulding technique. Both sheets were irradiated by electron beam irradiation at 100 to 800 kGy of irradiation dose. Unfortunately, the HDPE sheet showed degradation above 700 k...

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Main Author: Abdul Latif, Famiza
Format: Research Reports
Language:English
Published: Research Management Institute (RMI) 2010
Subjects:
Online Access:http://ir.uitm.edu.my/id/eprint/26395/
http://ir.uitm.edu.my/id/eprint/26395/1/LP_FAMIZA%20ABDUL%20LATIF%20RMI%2010_5.pdf
id uitm-26395
recordtype eprints
spelling uitm-263952019-11-20T01:51:55Z http://ir.uitm.edu.my/id/eprint/26395/ Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif Abdul Latif, Famiza Polymers and polymer manufacture In this study, the high density polyethylene (HDPE) and low density polyethylene (LDPE) sheets were prepared by compression moulding technique. Both sheets were irradiated by electron beam irradiation at 100 to 800 kGy of irradiation dose. Unfortunately, the HDPE sheet showed degradation above 700 kGy of irradiation dose. On the other hand, LDPE can withstand higher irradiation dose up to 800 kGy without showing any degradation. Both sheets became harder after irradiation due to the formation of crosslinking in the polymer structure. This has been confirmed from the thermal gravimetric and differential scanning calorimetry analysis in which the decomposition and the melting temperatures of these irradiated systems were higher than in their un-irradiated systems. The formation of crosslinking in these irradiated HDPE and LDPE system were further confirmed from the formation of interpenetrating structure which were observed from the electron micrograph of these irradiated polymers. From the hot-point probe measurement, both irradiated HDPE and LDPE were />type semiconductors. The presence of charge carriers in these systems were due to the derealization of electrons from the conjugated C=C bonds that formed in these irradiated systems. The formation of these conjugated C=C bonds in these irradiated HDPE and LDPE systems has been confirmed from the FTIR analysis in which the C=C bonds of /nms-vinylene and end-vinyl were detected at 965 cm"1 and 888 cm"1 respectively. However, it was found that irradiated HDPE system exhibited higher concentration of conjugated bonds than LDPE due to the closer chain arrangement in the HDPE system that in turn enhance the electrons derealization along the HDPE chain hence giving lower band gap energy of 2.75 eV compared to LDPE which was 3.97 eV. Interestingly, it was found that the band gap of irradiated HDPE was lower than the polyphenylene and silicon carbide semiconductor. Research Management Institute (RMI) 2010 Research Reports NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/26395/1/LP_FAMIZA%20ABDUL%20LATIF%20RMI%2010_5.pdf Abdul Latif, Famiza (2010) Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif. [Research Reports] (Unpublished)
repository_type Digital Repository
institution_category Local University
institution Universiti Teknologi MARA
building UiTM Institutional Repository
collection Online Access
language English
topic Polymers and polymer manufacture
spellingShingle Polymers and polymer manufacture
Abdul Latif, Famiza
Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif
description In this study, the high density polyethylene (HDPE) and low density polyethylene (LDPE) sheets were prepared by compression moulding technique. Both sheets were irradiated by electron beam irradiation at 100 to 800 kGy of irradiation dose. Unfortunately, the HDPE sheet showed degradation above 700 kGy of irradiation dose. On the other hand, LDPE can withstand higher irradiation dose up to 800 kGy without showing any degradation. Both sheets became harder after irradiation due to the formation of crosslinking in the polymer structure. This has been confirmed from the thermal gravimetric and differential scanning calorimetry analysis in which the decomposition and the melting temperatures of these irradiated systems were higher than in their un-irradiated systems. The formation of crosslinking in these irradiated HDPE and LDPE system were further confirmed from the formation of interpenetrating structure which were observed from the electron micrograph of these irradiated polymers. From the hot-point probe measurement, both irradiated HDPE and LDPE were />type semiconductors. The presence of charge carriers in these systems were due to the derealization of electrons from the conjugated C=C bonds that formed in these irradiated systems. The formation of these conjugated C=C bonds in these irradiated HDPE and LDPE systems has been confirmed from the FTIR analysis in which the C=C bonds of /nms-vinylene and end-vinyl were detected at 965 cm"1 and 888 cm"1 respectively. However, it was found that irradiated HDPE system exhibited higher concentration of conjugated bonds than LDPE due to the closer chain arrangement in the HDPE system that in turn enhance the electrons derealization along the HDPE chain hence giving lower band gap energy of 2.75 eV compared to LDPE which was 3.97 eV. Interestingly, it was found that the band gap of irradiated HDPE was lower than the polyphenylene and silicon carbide semiconductor.
format Research Reports
author Abdul Latif, Famiza
author_facet Abdul Latif, Famiza
author_sort Abdul Latif, Famiza
title Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif
title_short Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif
title_full Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif
title_fullStr Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif
title_full_unstemmed Preparation and characterization of radiated polymers for various electrochemical applications / Dr. Famiza Abdul Latif
title_sort preparation and characterization of radiated polymers for various electrochemical applications / dr. famiza abdul latif
publisher Research Management Institute (RMI)
publishDate 2010
url http://ir.uitm.edu.my/id/eprint/26395/
http://ir.uitm.edu.my/id/eprint/26395/1/LP_FAMIZA%20ABDUL%20LATIF%20RMI%2010_5.pdf
first_indexed 2023-09-18T23:16:47Z
last_indexed 2023-09-18T23:16:47Z
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