Characterization Of Halogen-Free Core Material With Various Retardants

The effect of three different types of halogen-free flame retardants, which are the intumescent ammonium polyphosphates (APP), melamine cyanurate (MC) and calcium borate (CaB) on epoxy/glass fiber composites was studied. The single and hybrid flame retardant fillers were used to investigate the com...

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Main Author:	Kheong , Patrick Lim Wye
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TA404 Composite materials TP1120 Plastic materials
Online Access:	http://eprints.usm.my/41801/1/PATRICK_LIM_WYE_KHEONG_24_Pages.pdf
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spelling	my-usm-ep.418012018-09-07T07:54:33Z Characterization Of Halogen-Free Core Material With Various Retardants 2012 Kheong , Patrick Lim Wye TA404 Composite materials TP1120 Plastic materials The effect of three different types of halogen-free flame retardants, which are the intumescent ammonium polyphosphates (APP), melamine cyanurate (MC) and calcium borate (CaB) on epoxy/glass fiber composites was studied. The single and hybrid flame retardant fillers were used to investigate the composites fire properties, mechanical and thermal properties. In general, after decompose at 700oC, CaB leaves behind the highest residual content, which mainly comprises of chars and glassy substrates. This is followed by APP which decomposes and forms the chars, while MC decomposes mainly into volatile gases. Among the three types, APP performed the best in flame retardancy while CaB is not effective in this composite. As for the mechanical properties of the composites, CaB gives the highest flexural strength while MC provides the highest flexural modulus to the composites. In terms of thermal properties, the flame retardants have lowered the thermal stability of the composites but did not significantly affect the coefficient of thermal expansion (CTE) and glass transition temperature (Tg). The second phase which studied on the hybrid system, found that APP-MC and APP-CaB according to 80-20 ratio gave synergistic effect on the fire properties to the composites. The hybrid compounds remain at V-O with improved LO1 reading. These hybrid's composition also gave Vhigher flexural strength, but was found not to affect the Tg and CTE. On the addition of 0.5 vol. % metal chelates into hybrid-flame retardant system, the fire resistance did not show any improvement in terms of their LOI values. The residual content of the flame retardants after decomposition have also decreased. The flexural properties, Tg and CTE were also not affected by the metal chelates. Universiti Sains Malaysia 2012 Thesis http://eprints.usm.my/41801/ http://eprints.usm.my/41801/1/PATRICK_LIM_WYE_KHEONG_24_Pages.pdf application/pdf en public
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TA404 Composite materials TP1120 Plastic materials
spellingShingle	TA404 Composite materials TP1120 Plastic materials Kheong , Patrick Lim Wye Characterization Of Halogen-Free Core Material With Various Retardants
description	The effect of three different types of halogen-free flame retardants, which are the intumescent ammonium polyphosphates (APP), melamine cyanurate (MC) and calcium borate (CaB) on epoxy/glass fiber composites was studied. The single and hybrid flame retardant fillers were used to investigate the composites fire properties, mechanical and thermal properties. In general, after decompose at 700oC, CaB leaves behind the highest residual content, which mainly comprises of chars and glassy substrates. This is followed by APP which decomposes and forms the chars, while MC decomposes mainly into volatile gases. Among the three types, APP performed the best in flame retardancy while CaB is not effective in this composite. As for the mechanical properties of the composites, CaB gives the highest flexural strength while MC provides the highest flexural modulus to the composites. In terms of thermal properties, the flame retardants have lowered the thermal stability of the composites but did not significantly affect the coefficient of thermal expansion (CTE) and glass transition temperature (Tg). The second phase which studied on the hybrid system, found that APP-MC and APP-CaB according to 80-20 ratio gave synergistic effect on the fire properties to the composites. The hybrid compounds remain at V-O with improved LO1 reading. These hybrid's composition also gave Vhigher flexural strength, but was found not to affect the Tg and CTE. On the addition of 0.5 vol. % metal chelates into hybrid-flame retardant system, the fire resistance did not show any improvement in terms of their LOI values. The residual content of the flame retardants after decomposition have also decreased. The flexural properties, Tg and CTE were also not affected by the metal chelates.
format	Thesis
author	Kheong , Patrick Lim Wye
author_facet	Kheong , Patrick Lim Wye
author_sort	Kheong , Patrick Lim Wye
title	Characterization Of Halogen-Free Core Material With Various Retardants
title_short	Characterization Of Halogen-Free Core Material With Various Retardants
title_full	Characterization Of Halogen-Free Core Material With Various Retardants
title_fullStr	Characterization Of Halogen-Free Core Material With Various Retardants
title_full_unstemmed	Characterization Of Halogen-Free Core Material With Various Retardants
title_sort	characterization of halogen-free core material with various retardants
publishDate	2012
url	http://eprints.usm.my/41801/1/PATRICK_LIM_WYE_KHEONG_24_Pages.pdf
_version_	1747820972738609152

Characterization Of Halogen-Free Core Material With Various Retardants

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