Development of Natural Rubber (NR) and Ethylene-Propylene-Diene-Monomer (EPDM) Rubber Blend for Tie Down Strap Compound

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dc.contributor.authorKarunarathna, A.K.S.
dc.contributor.authorWithanage, N.S.
dc.contributor.authorWithanachchi, A.J.M.
dc.date.accessioned2022-03-21T10:22:46Z
dc.date.available2022-03-21T10:22:46Z
dc.date.issued2013
dc.description.abstractTarpaulins or tarps are basically heavy duty waterproof covers that are used to secure loads in pickup trucks, tractors, dump trucks, etc. preventing from any untoward incidences happening during transportation. The tarps for trucks come with hooks or tie down straps to attach them securely to the vehicle body. These tie down straps are mainly used to hold tarps securely in place by providing high tensile strength and constant tension. Tie down strap is made out of natural rubber (NR), ethylene propylene diene monomer rubber (EPDM) or a combination of the both NR & EPDM by using cross-blending of two master batches method. Both NR and EPDM rubber have unique properties inherent to each material. Strap material selection is based on the climate they are used in. Natural rubber is ideal for cooler climates, as it will not crack and split in colder conditions. EPDM rubber was designed for warmer climates as it stands up better to extended sun exposure and hot UV rays (Anonymous, 2013).When concern the properties, NR will stretch further than EPDM rubber and will return to its normal non-stretched state quicker than EPDM rubber. To obtain the desired properties of both NR and EPDM, blends of the NR & EPDM are being used. The development of blends of NR and EPDM will deliver superior physical properties with the combination of excellent resistance to weathering of EPDM, in particular to attack by ozone (Rattanasupa, 2007). The addition of compatibilizer improves the compatibility of the NR/EPDM blends. It has been reported that graft copolymers widely used as compatibilizing agents, usually to enhance interfacial interaction in polymer blends, thus improving their mechanical properties (Arayapranee and Rempel, 2007). Based on above literature, a study was conducted to identify the most promising NR/EPDM blend ratio depend on cure characteristics and physical properties and to identify the effect of Methyl- methacrylate-butadiene-styrene (MBS) as a compatibilizer on NR/EPDM blend for tie down strap compound. Methodology The research study was carried out in a laboratory of Samson Compounds (Pvt) Ltd, Bataduwa, Galle. Complete randomized design (CRD) was used as the experiment design and the experiment was divided into two sub experiments as experiment 01 and experiment 02 aligning with the objectives. Total mixing time and the ingredients were different for each experiment but the blending procedure for both experiments was remained same. In experiment 01, the different blend ratios of NR/EPDM (N90, N80, N70, N60, N50, N40, N30, N20, N10) were prepared by mechanical blending and blend ratios were tested for cure characteristics, physical properties and thermal aging characteristics aged at 70°C for 22 h in respect of product specifications (Samson rubber products, 2012) of tie down strap. Replicates of hardness and tearing were three and replicates of tensile strength, elongation at break and tension set were arranged as four.en_US
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/8536/74-PLT-Development%20of%20Natural%20Rubber%20%28NR%29%20and%20Ethylene-Propylene-Diene-Monomer%20.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.subjectAgricultureen_US
dc.subjectExport Agricultureen_US
dc.subjectRubber Productionen_US
dc.subjectRubber Technologyen_US
dc.subjectPlantationsen_US
dc.subjectNatural Rubberen_US
dc.titleDevelopment of Natural Rubber (NR) and Ethylene-Propylene-Diene-Monomer (EPDM) Rubber Blend for Tie Down Strap Compounden_US
dc.title.alternativeResearch Symposium 2013en_US
dc.typeOtheren_US
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