$Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli$

Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli

The characteristics of the morphological structure of natural rubber latex films prepared from both sulphur and peroxide vulcanization process are visualized under the transmission electron microscope. In sulphur-vulcanized natural rubber latex films, the crosslinked regions appeared as dark areas...

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Main Author:	Ramli, Roslim
Format:	Thesis
Language:	English
Published:	2015
Subjects:	Polymers and polymer manufacture Rubber industry
Online Access:	http://ir.uitm.edu.my/id/eprint/15642/ http://ir.uitm.edu.my/id/eprint/15642/1/TM_ROSLIM%20RAMLI%20EH%2015_5.PDF

id	uitm-15642
recordtype	eprints
spelling	uitm-156422017-01-13T03:59:43Z http://ir.uitm.edu.my/id/eprint/15642/ Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli Ramli, Roslim Polymers and polymer manufacture Rubber industry The characteristics of the morphological structure of natural rubber latex films prepared from both sulphur and peroxide vulcanization process are visualized under the transmission electron microscope. In sulphur-vulcanized natural rubber latex films, the crosslinked regions appeared as dark areas within the elliptical shaped rubber particles and as strands around the rubber particles section in between rubber particles linking the rubber particles. In peroxide-vulcanized natural rubber latex films, crosslinks region appeared denser at the outer surface of the rubber particles compared to the inner phase.Hydroxyacetone has been shown as an effective activator for tert-buthyl hydroperoxide in the prevulcanization of natural rubber latex using peroxide process. The maximum tensile strength value was observed to occur at film prepared at a prevulcanization temperature of 60 °C, heating for 3 hours. The drying time and temperature play an important role in controlling the strength property of peroxide-vulcanized natural rubber latex films.Crosslink density is not the only factor that contributes to high strength property of natural rubber latex films.The addition of higher levels of crosslinking agent resulting in higher crosslink density and modulus of elasticity values, but, too high crosslinking may lead to subsequent decreased in the tensile strength value. Thus, a combination of the right degree of crosslinking range and the degree of particle cohesion are important factors governing the strength of natural rubber latex films. Leaching treatment and drying at elevated temperature, improved the coalescence of the rubber particles which in turn improved the tensile strength of the films. The addition of antioxidant hinders the thermal-oxidative effect during the drying process and thus, greater coherence of the films by heat treatment could be obtained. 2015 Thesis NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/15642/1/TM_ROSLIM%20RAMLI%20EH%2015_5.PDF Ramli, Roslim (2015) Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli. Masters thesis, Universiti Teknologi MARA.
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 Rubber industry
spellingShingle	Polymers and polymer manufacture Rubber industry Ramli, Roslim Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli
description	The characteristics of the morphological structure of natural rubber latex films prepared from both sulphur and peroxide vulcanization process are visualized under the transmission electron microscope. In sulphur-vulcanized natural rubber latex films, the crosslinked regions appeared as dark areas within the elliptical shaped rubber particles and as strands around the rubber particles section in between rubber particles linking the rubber particles. In peroxide-vulcanized natural rubber latex films, crosslinks region appeared denser at the outer surface of the rubber particles compared to the inner phase.Hydroxyacetone has been shown as an effective activator for tert-buthyl hydroperoxide in the prevulcanization of natural rubber latex using peroxide process. The maximum tensile strength value was observed to occur at film prepared at a prevulcanization temperature of 60 °C, heating for 3 hours. The drying time and temperature play an important role in controlling the strength property of peroxide-vulcanized natural rubber latex films.Crosslink density is not the only factor that contributes to high strength property of natural rubber latex films.The addition of higher levels of crosslinking agent resulting in higher crosslink density and modulus of elasticity values, but, too high crosslinking may lead to subsequent decreased in the tensile strength value. Thus, a combination of the right degree of crosslinking range and the degree of particle cohesion are important factors governing the strength of natural rubber latex films. Leaching treatment and drying at elevated temperature, improved the coalescence of the rubber particles which in turn improved the tensile strength of the films. The addition of antioxidant hinders the thermal-oxidative effect during the drying process and thus, greater coherence of the films by heat treatment could be obtained.
format	Thesis
author	Ramli, Roslim
author_facet	Ramli, Roslim
author_sort	Ramli, Roslim
title	Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli
title_short	Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli
title_full	Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli
title_fullStr	Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli
title_full_unstemmed	Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli
title_sort	characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / roslim ramli
publishDate	2015
url	http://ir.uitm.edu.my/id/eprint/15642/ http://ir.uitm.edu.my/id/eprint/15642/1/TM_ROSLIM%20RAMLI%20EH%2015_5.PDF
first_indexed	2023-09-18T22:54:19Z
last_indexed	2023-09-18T22:54:19Z
_version_	1777417751700176896

Characterizing physical properties and morphological structures of peroxidevulcanized and sulphur-vulcanized natural rubber latex films / Roslim Ramli

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