ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends

Epoxidized natural rubber (ENR-50) has been used as a compatibilizer for natural rubber-recycled acrylonitrile-butadiene rubber (NR/NBRr) blends, vulcanized by sulfur. NBR gloves have excellent resistance to punctures, tear and many types of chemicals, while NR has good physical and mechanical prope...

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Main Authors: Hazwani Syaza Ahmad, Hanafi Ismail, Azura Abd Rashid
Format: Article
Language:English
Published: Universiti Kebangsaan Malaysia 2015
Online Access:http://journalarticle.ukm.my/8963/1/09_Hazwani_Syaza_Ahmad.pdf
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author Hazwani Syaza Ahmad,
Hanafi Ismail,
Azura Abd Rashid,
author_facet Hazwani Syaza Ahmad,
Hanafi Ismail,
Azura Abd Rashid,
author_sort Hazwani Syaza Ahmad,
collection UKM
description Epoxidized natural rubber (ENR-50) has been used as a compatibilizer for natural rubber-recycled acrylonitrile-butadiene rubber (NR/NBRr) blends, vulcanized by sulfur. NBR gloves have excellent resistance to punctures, tear and many types of chemicals, while NR has good physical and mechanical properties. Incorporation of ENR-50 into the rubber blends has improved processability, stiffness, resilience and excellent oil resistance. NR/NBRr blends were prepared by two-roll mill with five different compositions with the ENR-50 content fixed at 10 phr. Cure characteristics, mechanical properties and morphology (SEM) studies were performed to determine the compatibility of NR/NBRr blends in the presence of ENR-50. The cure characteristics showed that NR/NBRr blends with the presence of ENR-50 have lower scorch time (ts2) and cure time (t90) than NR/NBRr blends without ENR-50. However, the NR/NBRr blends with ENR-50 exhibited higher minimum torque (ML) and maximum torque (MH) which indicated difficult processability of the blends after compatibilization. Incorporation of ENR-50 into NR/NBRr blends improved all the tensile properties (tensile strength, tensile modulus and elongation at break) compared with NR/NBRr blends without ENR-50. The improvement in hardness upon compatibilization is due to an increase in crosslink density. Scanning electron microscopy (SEM images) of the fracture surfaces indicates that, with the addition of ENR-50 in NR/NBRr blends, better adhesion between NR and NBRr was obtained, thus improving the compatibility of NR/NBRr blends.
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spelling ukm.eprints-89632016-12-14T06:48:34Z http://journalarticle.ukm.my/8963/ ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends Hazwani Syaza Ahmad, Hanafi Ismail, Azura Abd Rashid, Epoxidized natural rubber (ENR-50) has been used as a compatibilizer for natural rubber-recycled acrylonitrile-butadiene rubber (NR/NBRr) blends, vulcanized by sulfur. NBR gloves have excellent resistance to punctures, tear and many types of chemicals, while NR has good physical and mechanical properties. Incorporation of ENR-50 into the rubber blends has improved processability, stiffness, resilience and excellent oil resistance. NR/NBRr blends were prepared by two-roll mill with five different compositions with the ENR-50 content fixed at 10 phr. Cure characteristics, mechanical properties and morphology (SEM) studies were performed to determine the compatibility of NR/NBRr blends in the presence of ENR-50. The cure characteristics showed that NR/NBRr blends with the presence of ENR-50 have lower scorch time (ts2) and cure time (t90) than NR/NBRr blends without ENR-50. However, the NR/NBRr blends with ENR-50 exhibited higher minimum torque (ML) and maximum torque (MH) which indicated difficult processability of the blends after compatibilization. Incorporation of ENR-50 into NR/NBRr blends improved all the tensile properties (tensile strength, tensile modulus and elongation at break) compared with NR/NBRr blends without ENR-50. The improvement in hardness upon compatibilization is due to an increase in crosslink density. Scanning electron microscopy (SEM images) of the fracture surfaces indicates that, with the addition of ENR-50 in NR/NBRr blends, better adhesion between NR and NBRr was obtained, thus improving the compatibility of NR/NBRr blends. Universiti Kebangsaan Malaysia 2015-06 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/8963/1/09_Hazwani_Syaza_Ahmad.pdf Hazwani Syaza Ahmad, and Hanafi Ismail, and Azura Abd Rashid, (2015) ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends. Sains Malaysiana, 44 (6). pp. 835-842. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid44bil6_2015/KandunganJilid44Bil6_2015.html
spellingShingle Hazwani Syaza Ahmad,
Hanafi Ismail,
Azura Abd Rashid,
ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends
title ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends
title_full ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends
title_fullStr ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends
title_full_unstemmed ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends
title_short ENR-50 compatibilized natural rubber/recycled acrylonitrile-butadiene rubber blends
title_sort enr 50 compatibilized natural rubber recycled acrylonitrile butadiene rubber blends
url http://journalarticle.ukm.my/8963/1/09_Hazwani_Syaza_Ahmad.pdf
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