Preparation And Properties Of Intrinsic Self-Healing Natural Rubber

Self-healing rubber is a new group of smart material which has the ability to restore the damages without manual intervention. The work carried out in this thesis explored the potential of intrinsic self-healing natural rubber based on reversible metal thiolate ionic networks, thermo-reversible Zn2+...

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Main Author:	Thajudin, Nuur Laila Najwa
Format:	Thesis
Language:	English
Published:	2021
Subjects:	T Technology
Online Access:	http://eprints.usm.my/56239/1/Preparation%20And%20Properties%20Of%20Intrinsic%20Self-Healing%20Natural%20Rubber.pdf
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spelling	my-usm-ep.562392023-01-06T08:31:57Z Preparation And Properties Of Intrinsic Self-Healing Natural Rubber 2021-06-01 Thajudin, Nuur Laila Najwa T Technology TA401-492 Materials of engineering and construction. Mechanics of materials Self-healing rubber is a new group of smart material which has the ability to restore the damages without manual intervention. The work carried out in this thesis explored the potential of intrinsic self-healing natural rubber based on reversible metal thiolate ionic networks, thermo-reversible Zn2+ salt bonding and thermo-reversible disulphide exchange. The metal thiolate was added in natural rubber (NR) compound through peroxide vulcanization system at different zinc thiolate content (0, 10, 20, 30, 40 phr). Evidence for reversible metal thiolate ionic networks was obtained through Fourier-transform infrared spectroscopy (FTIR) and swelling density analysis. The tensile properties and tear strength recovered at 90 %, and 132.6 %, respectively when the broken sample was brought into contact for 10 minutes at room temperature. The fatigue lifespan of the materials increased by 60 % compared with the non-self-healing sample. Thermo-reversible salt bonding approach is based on the ionic interactions between Zn2+ ions from zinc thiolate crosslinker and carboxyl groups which were introduced by grafting different content of methacrylic acid (MAA) (0.5, 0.7, 1.0, 1.5, 2.0 phr) onto NR chains. Evidence for Zn2+ salt bonding was obtained from FTIR analysis. The results revealed that the materials able to recover up to 76 % under tensile mode and 100 % under tear mode and fatigue test. For self-healing approach through thermo-reversible disulphide exchange, the NR chain was rafted with different Bisphenol A (BIS A) content (0, 2, 5, 7 phr). Evidence for disulphide networks was obtained from FTIR analysis. The results revealed that the materials able to recover up at 150 0C. 2021-06 Thesis http://eprints.usm.my/56239/ http://eprints.usm.my/56239/1/Preparation%20And%20Properties%20Of%20Intrinsic%20Self-Healing%20Natural%20Rubber.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Thajudin, Nuur Laila Najwa Preparation And Properties Of Intrinsic Self-Healing Natural Rubber
description	Self-healing rubber is a new group of smart material which has the ability to restore the damages without manual intervention. The work carried out in this thesis explored the potential of intrinsic self-healing natural rubber based on reversible metal thiolate ionic networks, thermo-reversible Zn2+ salt bonding and thermo-reversible disulphide exchange. The metal thiolate was added in natural rubber (NR) compound through peroxide vulcanization system at different zinc thiolate content (0, 10, 20, 30, 40 phr). Evidence for reversible metal thiolate ionic networks was obtained through Fourier-transform infrared spectroscopy (FTIR) and swelling density analysis. The tensile properties and tear strength recovered at 90 %, and 132.6 %, respectively when the broken sample was brought into contact for 10 minutes at room temperature. The fatigue lifespan of the materials increased by 60 % compared with the non-self-healing sample. Thermo-reversible salt bonding approach is based on the ionic interactions between Zn2+ ions from zinc thiolate crosslinker and carboxyl groups which were introduced by grafting different content of methacrylic acid (MAA) (0.5, 0.7, 1.0, 1.5, 2.0 phr) onto NR chains. Evidence for Zn2+ salt bonding was obtained from FTIR analysis. The results revealed that the materials able to recover up to 76 % under tensile mode and 100 % under tear mode and fatigue test. For self-healing approach through thermo-reversible disulphide exchange, the NR chain was rafted with different Bisphenol A (BIS A) content (0, 2, 5, 7 phr). Evidence for disulphide networks was obtained from FTIR analysis. The results revealed that the materials able to recover up at 150 0C.
format	Thesis
qualification_level	Master's degree
author	Thajudin, Nuur Laila Najwa
author_facet	Thajudin, Nuur Laila Najwa
author_sort	Thajudin, Nuur Laila Najwa
title	Preparation And Properties Of Intrinsic Self-Healing Natural Rubber
title_short	Preparation And Properties Of Intrinsic Self-Healing Natural Rubber
title_full	Preparation And Properties Of Intrinsic Self-Healing Natural Rubber
title_fullStr	Preparation And Properties Of Intrinsic Self-Healing Natural Rubber
title_full_unstemmed	Preparation And Properties Of Intrinsic Self-Healing Natural Rubber
title_sort	preparation and properties of intrinsic self-healing natural rubber
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan Sumber Mineral
publishDate	2021
url	http://eprints.usm.my/56239/1/Preparation%20And%20Properties%20Of%20Intrinsic%20Self-Healing%20Natural%20Rubber.pdf
_version_	1776101155399532544

Preparation And Properties Of Intrinsic Self-Healing Natural Rubber

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