The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends

The effects of cure characteristics, physical and mechanical properties and morphological properties on styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends were investigated. SBR/CRr blends with blend ratios 95/5, 85/15, 75/25, 65/35 and 50/50 were prepared using two roll mill a...

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Main Author:	Ahmad Azrem, Azmi
Format:	Thesis
Language:	English
Subjects:	SBR Recycled CR Styrene butadiene rubber Rubber Waste materials
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/42885/1/P.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/42885/2/Full%20Text.pdf
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spelling	my-unimap-428852016-09-19T08:26:34Z The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends Ahmad Azrem, Azmi Dr Nik Noriman Zulkepli The effects of cure characteristics, physical and mechanical properties and morphological properties on styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends were investigated. SBR/CRr blends with blend ratios 95/5, 85/15, 75/25, 65/35 and 50/50 were prepared using two roll mill at room temperature and followed by compression moulding. The results on comparison of styrene butadiene rubber/virgin chloroprene rubber (SBR/CRv) blends with SBR/CRr blends showed that at similar blend ratios, particularly up to 15 phr, SBR/CRr blends exhibited improvement in tensile strength while the M100, hardness and crosslink density of SBR/CRr blends exhibited increment value in all blend ratios. The smallest size of CRr particles S1 (346-486 μm) in SBR/CRr blends showed a better cure characteristics and mechanical properties compared with all other blend ratios in S2 (664-891 μm) and S3 (0.3-0.7 mm). Futhermore, the processing become more efficient and the contact surface area increased which provided more efficient interfacial bonds. The compatibilization of SBR/CRr blends with 5 phr of trans-polyoctylene rubber (TOR) improved the adhesion between CRr and the SBR matrix, thus, improving the compatibility of SBR/CRr blends. Cure characteristics of compatibilised SBR/CRr blend have shorter scorch time, t2 and cure time, t90 than uncompatibilised SBR/CRr blends. Compatibilised SBR/CRr blends showed lower minimum torque (ML) compared to uncompatibilised SBR/CRr blends at all blend ratios. However, maximum torque (MH) of compatibilised SBR/CRr blends exhibit the opposite trend compared with the uncompatibilised SBR/CRr blends. The tensile strength, M100, hardness and crosslink density of compatibilised SBR/CRr blends also improved compared with uncompatibilised SBR/CRr blends. The cure time, t90 of SBR/CRr/CB blends and SBR/CRr/CaCO3 blends decreased with increasing CRr content in both blends. However, scorch time, t2, increased with increasing CRr content in both blends. SBR/CRr/CB blends showed higher minimum torque (ML) compared to SBR/CRr/CaCO3 blends at all blend ratios. However, maximum torque (MH) of SBR/CRr/CB blends exhibit the opposite trend compared with the SBR/CRr/CaCO3 blends. SBR/CRr/CB blends exhibited a better result in all mechanical and physical properties compared with SBR/CRr/CaCO3 blends at all blend ratios. Universiti Malaysia Perlis (UniMAP) 2014 Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/42885 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/42885/1/P.1-24.pdf 424c91533f0e174fb412e2a473d9326e http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/42885/2/Full%20Text.pdf 3ada90a272f50cdd9517410bf9f6dc60 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/42885/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 SBR Recycled CR Styrene butadiene rubber Rubber Waste materials School of Materials Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Dr Nik Noriman Zulkepli
topic	SBR Recycled CR Styrene butadiene rubber Rubber Waste materials
spellingShingle	SBR Recycled CR Styrene butadiene rubber Rubber Waste materials Ahmad Azrem, Azmi The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends
description	The effects of cure characteristics, physical and mechanical properties and morphological properties on styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends were investigated. SBR/CRr blends with blend ratios 95/5, 85/15, 75/25, 65/35 and 50/50 were prepared using two roll mill at room temperature and followed by compression moulding. The results on comparison of styrene butadiene rubber/virgin chloroprene rubber (SBR/CRv) blends with SBR/CRr blends showed that at similar blend ratios, particularly up to 15 phr, SBR/CRr blends exhibited improvement in tensile strength while the M100, hardness and crosslink density of SBR/CRr blends exhibited increment value in all blend ratios. The smallest size of CRr particles S1 (346-486 μm) in SBR/CRr blends showed a better cure characteristics and mechanical properties compared with all other blend ratios in S2 (664-891 μm) and S3 (0.3-0.7 mm). Futhermore, the processing become more efficient and the contact surface area increased which provided more efficient interfacial bonds. The compatibilization of SBR/CRr blends with 5 phr of trans-polyoctylene rubber (TOR) improved the adhesion between CRr and the SBR matrix, thus, improving the compatibility of SBR/CRr blends. Cure characteristics of compatibilised SBR/CRr blend have shorter scorch time, t2 and cure time, t90 than uncompatibilised SBR/CRr blends. Compatibilised SBR/CRr blends showed lower minimum torque (ML) compared to uncompatibilised SBR/CRr blends at all blend ratios. However, maximum torque (MH) of compatibilised SBR/CRr blends exhibit the opposite trend compared with the uncompatibilised SBR/CRr blends. The tensile strength, M100, hardness and crosslink density of compatibilised SBR/CRr blends also improved compared with uncompatibilised SBR/CRr blends. The cure time, t90 of SBR/CRr/CB blends and SBR/CRr/CaCO3 blends decreased with increasing CRr content in both blends. However, scorch time, t2, increased with increasing CRr content in both blends. SBR/CRr/CB blends showed higher minimum torque (ML) compared to SBR/CRr/CaCO3 blends at all blend ratios. However, maximum torque (MH) of SBR/CRr/CB blends exhibit the opposite trend compared with the SBR/CRr/CaCO3 blends. SBR/CRr/CB blends exhibited a better result in all mechanical and physical properties compared with SBR/CRr/CaCO3 blends at all blend ratios.
format	Thesis
author	Ahmad Azrem, Azmi
author_facet	Ahmad Azrem, Azmi
author_sort	Ahmad Azrem, Azmi
title	The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends
title_short	The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends
title_full	The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends
title_fullStr	The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends
title_full_unstemmed	The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends
title_sort	properties of styrene butadiene rubber/recycled chloroprene rubber (sbr/crr) blends
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Materials Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/42885/1/P.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/42885/2/Full%20Text.pdf
_version_	1747836816991453184

The properties of styrene butadiene rubber/recycled chloroprene rubber (SBR/CRr) blends

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