Effect of Nanosilica and Crosslinking System on the Mechanical Properties and Swelling Resistance of EPDM/SBR Nanocompos
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ORIGINAL PAPER
Effect of Nanosilica and Crosslinking System on the Mechanical Properties and Swelling Resistance of EPDM/SBR Nanocomposites with and without TESPT S. Vishvanathperumal 1 & G. Anand 2 Received: 21 August 2020 / Accepted: 16 October 2020 # Springer Nature B.V. 2020
Abstract The ethylene-propylene-diene monomer/styrene-butadiene rubber (EPDM/SBR)-nanosilica (SiO2) nanocomposite was prepared. The 0–10 parts per hundred rubber (phr) of SiO2 with EPDM/SBR was mixed on a two-roll mill. The effect of nanosilica (0–10 phr), crosslinking system (sulphur, dicumyl peroxide and mixed) and silane coupling agent (bis(triethoxysilylpropyl)tetrasulphide) on the curing characteristics, mechanical properties, rebound resilience, compression characteristics, abrasion, swelling property and morphological characteristics of the EPDM/SBR-SiO2 nanocomposites was investigated and studied. From the results, it was clear that the mechanical, wear and swelling properties steps-up with increase in the content of nanosilica particles in it. The sulphur cured rubber composite exhibits an overall improved properties as compared with other crosslinking agents such as peroxide and mixed systems. The addition of silane coupling agent (SCA) enhances the properties of the nanocomposites to a greater extent. From the analysis, it was clear that the effect of nanosilica concentration in the rubber composite with SCA was found to be superior compared to nanocomposites without it. Keywords EPDM/SBR . Nanosilica . Crosslinking systems . Silane coupling agent . Mechanical properties
1 Introduction The introduction of the reinforcement in the rubber matrix improves the properties such as mechanical, physical and thermal properties. At the same time, it also reduces the overall weight and cost of the rubber composites [1, 2]. Currently, more than hundred types of reinforcing materials was used in rubber composite and have been reported in the literatures. But only a few of them are cost-effective, commercialized and extensively used [3]. Carbon black (CB) was commercially used as a reinforcing material in rubber industries in the past decades. The drawbacks associated with the carbon black was its dark colour and pollution related issues. This leads to the development of newer reinforcing * G. Anand [email protected]; [email protected] 1
Department of Mechanical Engineering, S.A. Engineering College, Thiruverkadu, Chennai, Tamilnadu 600 077, India
2
Department of Mechanical Engineering, MVJ College of Engineering, Bangalore, Karnataka 560067, India
materials in the recent decades [4–6] such as montmorillonite [7], silicate layered clays [8], carbon nanotubes [9] and halloysite nanotubes [10] which enhances the mechanical properties, thermal stability and flammability of the rubber composites, when added even in small quantity. Rice husk was considered as a naturally available agricultural source for the production of nanosilica. The preparation of nanosilica from the rice husk was found to be both environmental friendly and economicall
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