Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)

This study reports the effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE). The purpose of this study is to gain knowledge and understand behaviour of HDPE film after adding cobalt carboxylate as additive after and before expose to the heating in the oven at 600C and also to i...

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Main Author:	Norshafika, Yahya
Format:	Undergraduates Project Papers
Language:	English
Published:	2010
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/3145/ http://umpir.ump.edu.my/id/eprint/3145/ http://umpir.ump.edu.my/id/eprint/3145/1/CD5842_NORSHAFIKA_YAHYA.pdf

id	ump-3145
recordtype	eprints
spelling	ump-31452015-03-03T07:59:40Z http://umpir.ump.edu.my/id/eprint/3145/ Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE) Norshafika, Yahya TP Chemical technology This study reports the effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE). The purpose of this study is to gain knowledge and understand behaviour of HDPE film after adding cobalt carboxylate as additive after and before expose to the heating in the oven at 600C and also to investigate characteristics of cobalt carboxylate itself. The additives used were three cobalt carboxylate which are cobalt stearate, cobalt palmitate, and cobalt laurate and thin film HDPE containing these additives were prepared with different concentration (0.2% w/w, 0.5% w/w, and 1.0% w/w) by sheeting process. Seventy micron film of HDPE containing different concentration of additives and 3 types of cobalt carboxylate were subsequently exposed to heat and were observed. The characteristics of cobalt carboxylate were monitor by measuring the temperature degradation using TGA (Thermal Gravimetric Analyzer) and to measuring melting point using DSC (Different Scanning Calorimeter). While, the degradation was monitored by measuring the elongation break using tensile machine, changes of structure peak using FTIR and surface film using SEM. In DSC and TGA result, found that, cobalt stearate has high temperature of degradation and high melting point at 121.970C; 309.80C followed by cobalt palmitate and cobalt laurate at 84.060C; 282.740C and 69.040C; 182.970C, respectively. While for FTIR result, Carbonyl Index (CI), which in turn leads to an increase according to the increase of concentration of additives especially cobalt stearate and for tensile test, the percent of break strain decreased inversely proportional with increasing concentration additive present. Results on mechanical properties reveal that samples containing cobalt carboxylate, become mechanically fragile, embrittlement and flaking occurred for samples exposed to longer time periods in the oven for 480 hours. The effect of cobalt carboxylate on air oven aging, show that different behaviour of HDPE at different concentrations will increase proportionally with increasing chain length and follows order CoSt3>CoPal3>CoLau3 2010-04 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/3145/1/CD5842_NORSHAFIKA_YAHYA.pdf Norshafika, Yahya (2010) Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE). Faculty of Chemical & Natural Resources Engineering , Universiti Malaysia Pahang . http://iportal.ump.edu.my/lib/item?id=chamo:58623&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Norshafika, Yahya Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)
description	This study reports the effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE). The purpose of this study is to gain knowledge and understand behaviour of HDPE film after adding cobalt carboxylate as additive after and before expose to the heating in the oven at 600C and also to investigate characteristics of cobalt carboxylate itself. The additives used were three cobalt carboxylate which are cobalt stearate, cobalt palmitate, and cobalt laurate and thin film HDPE containing these additives were prepared with different concentration (0.2% w/w, 0.5% w/w, and 1.0% w/w) by sheeting process. Seventy micron film of HDPE containing different concentration of additives and 3 types of cobalt carboxylate were subsequently exposed to heat and were observed. The characteristics of cobalt carboxylate were monitor by measuring the temperature degradation using TGA (Thermal Gravimetric Analyzer) and to measuring melting point using DSC (Different Scanning Calorimeter). While, the degradation was monitored by measuring the elongation break using tensile machine, changes of structure peak using FTIR and surface film using SEM. In DSC and TGA result, found that, cobalt stearate has high temperature of degradation and high melting point at 121.970C; 309.80C followed by cobalt palmitate and cobalt laurate at 84.060C; 282.740C and 69.040C; 182.970C, respectively. While for FTIR result, Carbonyl Index (CI), which in turn leads to an increase according to the increase of concentration of additives especially cobalt stearate and for tensile test, the percent of break strain decreased inversely proportional with increasing concentration additive present. Results on mechanical properties reveal that samples containing cobalt carboxylate, become mechanically fragile, embrittlement and flaking occurred for samples exposed to longer time periods in the oven for 480 hours. The effect of cobalt carboxylate on air oven aging, show that different behaviour of HDPE at different concentrations will increase proportionally with increasing chain length and follows order CoSt3>CoPal3>CoLau3
format	Undergraduates Project Papers
author	Norshafika, Yahya
author_facet	Norshafika, Yahya
author_sort	Norshafika, Yahya
title	Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)
title_short	Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)
title_full	Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)
title_fullStr	Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)
title_full_unstemmed	Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)
title_sort	effect of cobalt carboxylate on thermal degradation of polyethylene (hdpe)
publishDate	2010
url	http://umpir.ump.edu.my/id/eprint/3145/ http://umpir.ump.edu.my/id/eprint/3145/ http://umpir.ump.edu.my/id/eprint/3145/1/CD5842_NORSHAFIKA_YAHYA.pdf
first_indexed	2023-09-18T21:57:13Z
last_indexed	2023-09-18T21:57:13Z
_version_	1777414159716057088

Effect of cobalt carboxylate on thermal degradation of polyethylene (HDPE)

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