Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites

The effects of carbon nanotubes addition and irradiation modification on the characterization and properties of epoxidized natural rubber (ENR-50)/poly(vinyl chloride) (PVC)/multi-walled carbon nanotubes (MWNTs) nanocomposites were investigated. ENR-50/PVC/MWNTs nanocomposites were prepared by melt...

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Main Author:	Ahmad, Mohd. Shahrulnizam
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/77752/1/MohdShahrulnizamAhmadMFChE20171.pdf
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spelling	my-utm-ep.777522018-07-04T11:43:00Z Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites 2015-01 Ahmad, Mohd. Shahrulnizam TP Chemical technology The effects of carbon nanotubes addition and irradiation modification on the characterization and properties of epoxidized natural rubber (ENR-50)/poly(vinyl chloride) (PVC)/multi-walled carbon nanotubes (MWNTs) nanocomposites were investigated. ENR-50/PVC/MWNTs nanocomposites were prepared by melt mixing in a Brabender Plastigraph at 150 °C with a rotor speed of 50 rpm followed by compression molding at 160 °C. The samples were irradiated in a 2 MeV electron beam machine in a dose range from 50 to 200 kGy. The functional groups, gel content, morphology, dynamic mechanical properties, volume resistivity and tensile properties of the resulting composites were investigated as a function of MWNTs contents, functionalized MWNTs and irradiation dose. Gel content confirmed the existence of irradiation-induced crosslinking. The highest gel content value was recorded at 8 phr of MWNTs content in nanocomposites. At 0 kGy (up to 6 phr), the MWNTs-COOH had higher gel content value. However, after irradiation (150 kGy), MWNTs nanocomposites recorded the highest gel content value. The x-ray diffraction pattern showed that 2 phr MWNTs content nanocomposites had a better degree of crystallinity than 8 phr MWNTs content and the degree of crystallinity was enhanced after irradiation. The addition of 8 phr of all MWNTs led to the increase of storage modulus and glass transition temperature, and was further enhanced after irradiation (200 kGy). Based on dynamic mechanical analysis results, 8 phr of functionalized MWNTs had better crosslinking as compared with unfunctionalized MWNTs. Volume resistivity increased with increasing MWNTs contents and irradiation dosage. The functionalized MWNTs showed higher resistivity at 0 and 150 kGy of irradiation doses. The tensile strengths of the irradiated nanocomposites increased up to 8 phr of unfunctionalized MWNTs, 6 phr of MWNTs-COOH and 10 phr of MWNTs-OH above 50 kGy. The modulus 100 (M100) increased and elongation at break (Eb) decreased with increasing of MWNTs content and irradiation doses. Functionalized MWNTs showed higher M100 and lower Eb at 0 kGy. However at 200 kGy of irradiation dose, the M100 was lowered and Eb was higher for functionalized MWNTs nanocomposites. 2015-01 Thesis http://eprints.utm.my/id/eprint/77752/ http://eprints.utm.my/id/eprint/77752/1/MohdShahrulnizamAhmadMFChE20171.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:105167 masters Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering Faculty of Chemical and Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Ahmad, Mohd. Shahrulnizam Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites
description	The effects of carbon nanotubes addition and irradiation modification on the characterization and properties of epoxidized natural rubber (ENR-50)/poly(vinyl chloride) (PVC)/multi-walled carbon nanotubes (MWNTs) nanocomposites were investigated. ENR-50/PVC/MWNTs nanocomposites were prepared by melt mixing in a Brabender Plastigraph at 150 °C with a rotor speed of 50 rpm followed by compression molding at 160 °C. The samples were irradiated in a 2 MeV electron beam machine in a dose range from 50 to 200 kGy. The functional groups, gel content, morphology, dynamic mechanical properties, volume resistivity and tensile properties of the resulting composites were investigated as a function of MWNTs contents, functionalized MWNTs and irradiation dose. Gel content confirmed the existence of irradiation-induced crosslinking. The highest gel content value was recorded at 8 phr of MWNTs content in nanocomposites. At 0 kGy (up to 6 phr), the MWNTs-COOH had higher gel content value. However, after irradiation (150 kGy), MWNTs nanocomposites recorded the highest gel content value. The x-ray diffraction pattern showed that 2 phr MWNTs content nanocomposites had a better degree of crystallinity than 8 phr MWNTs content and the degree of crystallinity was enhanced after irradiation. The addition of 8 phr of all MWNTs led to the increase of storage modulus and glass transition temperature, and was further enhanced after irradiation (200 kGy). Based on dynamic mechanical analysis results, 8 phr of functionalized MWNTs had better crosslinking as compared with unfunctionalized MWNTs. Volume resistivity increased with increasing MWNTs contents and irradiation dosage. The functionalized MWNTs showed higher resistivity at 0 and 150 kGy of irradiation doses. The tensile strengths of the irradiated nanocomposites increased up to 8 phr of unfunctionalized MWNTs, 6 phr of MWNTs-COOH and 10 phr of MWNTs-OH above 50 kGy. The modulus 100 (M100) increased and elongation at break (Eb) decreased with increasing of MWNTs content and irradiation doses. Functionalized MWNTs showed higher M100 and lower Eb at 0 kGy. However at 200 kGy of irradiation dose, the M100 was lowered and Eb was higher for functionalized MWNTs nanocomposites.
format	Thesis
qualification_level	Master's degree
author	Ahmad, Mohd. Shahrulnizam
author_facet	Ahmad, Mohd. Shahrulnizam
author_sort	Ahmad, Mohd. Shahrulnizam
title	Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites
title_short	Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites
title_full	Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites
title_fullStr	Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites
title_full_unstemmed	Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites
title_sort	characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering
granting_department	Faculty of Chemical and Energy Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/77752/1/MohdShahrulnizamAhmadMFChE20171.pdf
_version_	1747817822282579968

Characterization of irradiated epoxidized natural rubber/polyvinyl chloride/carbon nanotubes nanocomposites

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