Room Temperature Self-Healable Natural Rubber

Indeed to the properties of rubber which can sustain large deflection with little deformation. However, rubber still fail through fracture and fatigue over their service period. Emerging self-healing provides capability to arrest crack propagation at early stage and thereby preventing catastrophic...

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Main Author: Sardi, Nur Syamsinar
Format: Monograph
Language:English
Published: Universiti Sains Malaysia 2018
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Online Access:http://eprints.usm.my/53246/1/Room%20Temperature%20Self-Healable%20Natural%20Rubber_Nur%20Syamsinar%20Sardi_B1_2018.pdf
http://eprints.usm.my/53246/
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Institution: Universiti Sains Malaysia
Language: English
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spelling my.usm.eprints.53246 http://eprints.usm.my/53246/ Room Temperature Self-Healable Natural Rubber Sardi, Nur Syamsinar T Technology TN Mining Engineering. Metallurgy Indeed to the properties of rubber which can sustain large deflection with little deformation. However, rubber still fail through fracture and fatigue over their service period. Emerging self-healing provides capability to arrest crack propagation at early stage and thereby preventing catastrophic failure. The aim of this work was to produce self-healing natural rubber that have capability to heal themselves spontaneously and autonomously at room temperature. Firstly, there were 2 stages implemented zinc thiolate was employed as self-healing agent with peroxide induced vulcanization to developed formation of covalent and reversible bonds with the natural rubber and exploited it as a potential self-healable materials. The amount of zinc thiolate was varied at four different levels (10 phr, 20 phr, 30 phr and 40 phr) to assess the optimum amount of zinc thiolate to achieve highest healing capability. Tensile properties of cured rubbers before and after healing process were measured using universal tensile tester to obtain healing efficiency of the materials. The results revealed that the developed self-healing natural rubber able to recover 60%-80% of its initial mechanical properties in a minutes and almost 100% in 10 minutes at room temperature without the aid of any external resources. It was also found that 30 phr zinc thiolate produced samples with highest healing capability. Evidence from Scanning Electron Microscopy (SEM) showed that the fracture area was fully recovered after the healing processed. Secondly, the effect of carbon black on the self-healing capability of the developed self-healing natural rubber was also investigated. The amount of carbon black was varied at three different levels (5 phr, 10 phr and 30 phr). Cure characteristics of the materials were measured using rheometer (MDR 2000). Tensile testing, crosslink density, elemental characterization and thermal analysis were carried out to investigate the healing efficiency of developed self-healing natural rubber filled with carbon black. The results revealed that addition of carbon black reduced the healing efficiency by 20%-30% but material with and without carbon black showed a stable thermal properties. SEM images showed that the fracture area was recovered after the healing process. Universiti Sains Malaysia 2018-06-25 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/53246/1/Room%20Temperature%20Self-Healable%20Natural%20Rubber_Nur%20Syamsinar%20Sardi_B1_2018.pdf Sardi, Nur Syamsinar (2018) Room Temperature Self-Healable Natural Rubber. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral. (Submitted)
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T Technology
TN Mining Engineering. Metallurgy
spellingShingle T Technology
TN Mining Engineering. Metallurgy
Sardi, Nur Syamsinar
Room Temperature Self-Healable Natural Rubber
description Indeed to the properties of rubber which can sustain large deflection with little deformation. However, rubber still fail through fracture and fatigue over their service period. Emerging self-healing provides capability to arrest crack propagation at early stage and thereby preventing catastrophic failure. The aim of this work was to produce self-healing natural rubber that have capability to heal themselves spontaneously and autonomously at room temperature. Firstly, there were 2 stages implemented zinc thiolate was employed as self-healing agent with peroxide induced vulcanization to developed formation of covalent and reversible bonds with the natural rubber and exploited it as a potential self-healable materials. The amount of zinc thiolate was varied at four different levels (10 phr, 20 phr, 30 phr and 40 phr) to assess the optimum amount of zinc thiolate to achieve highest healing capability. Tensile properties of cured rubbers before and after healing process were measured using universal tensile tester to obtain healing efficiency of the materials. The results revealed that the developed self-healing natural rubber able to recover 60%-80% of its initial mechanical properties in a minutes and almost 100% in 10 minutes at room temperature without the aid of any external resources. It was also found that 30 phr zinc thiolate produced samples with highest healing capability. Evidence from Scanning Electron Microscopy (SEM) showed that the fracture area was fully recovered after the healing processed. Secondly, the effect of carbon black on the self-healing capability of the developed self-healing natural rubber was also investigated. The amount of carbon black was varied at three different levels (5 phr, 10 phr and 30 phr). Cure characteristics of the materials were measured using rheometer (MDR 2000). Tensile testing, crosslink density, elemental characterization and thermal analysis were carried out to investigate the healing efficiency of developed self-healing natural rubber filled with carbon black. The results revealed that addition of carbon black reduced the healing efficiency by 20%-30% but material with and without carbon black showed a stable thermal properties. SEM images showed that the fracture area was recovered after the healing process.
format Monograph
author Sardi, Nur Syamsinar
author_facet Sardi, Nur Syamsinar
author_sort Sardi, Nur Syamsinar
title Room Temperature Self-Healable Natural Rubber
title_short Room Temperature Self-Healable Natural Rubber
title_full Room Temperature Self-Healable Natural Rubber
title_fullStr Room Temperature Self-Healable Natural Rubber
title_full_unstemmed Room Temperature Self-Healable Natural Rubber
title_sort room temperature self-healable natural rubber
publisher Universiti Sains Malaysia
publishDate 2018
url http://eprints.usm.my/53246/1/Room%20Temperature%20Self-Healable%20Natural%20Rubber_Nur%20Syamsinar%20Sardi_B1_2018.pdf
http://eprints.usm.my/53246/
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