Browsing by Author "Siriwaradena, S."

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    Performance of coconut kernel residue oil as a processing oil in carbon black filled natural rubber composites
    (Uva Wellassa University of Sri Lanka, 2015) Samarakoon, M. G. L.; Withanage, N. S.; Siriwaradena, S.
    Processing oil is aromatic or aliphatic hydrocarbon used in dry rubber compounding to obtain efficient dispersion of filler in rubber, lower the power consumption during mixing, provides lubrication between rubber molecules. Incorporation of processing oil improves the physical properties of natural and synthetic rubber such as elasticity, low temperature performance, and aid in the dispersion of pigments resulting in improvement of tensile strength and abrasion resistance and rather they decrease hardness, elongation at break, tensile strength, resilience. Mainly aromatic, paraffinic and naphthenic oils are used as processing oils in dry rubber compounding. According to the regulations of European Parliament, use of petroleum based processing oil rich in in polycyclic aromatic hydrocarbon has been banded since 2009 due to carcinogenic. Therefore, scientists are switching onto naturally occurring oils because of restriction on use of fossil fuel based processing oils. An effort was taken to evaluate the performance of the Coconut Kernel Residue Oil (CKRO) as a processing oil in Carbon Black (CB) filled natural rubber composites. Methodology Firstly, the CKRO was characterized with regards to fee fatty acid, moisture, ash and metal ions ). Then CKRO was incorporated in different treatment levels (0, 2, 4, 6, 8 and 10 phr) as processing oil in carbon black (CB) filled natural rubber composites. Both curing and physico-mechanical properties including tensile strength, tear strength, elongation at break, abrasion volume loss, compression set, rebound resilience and harness of the vulcanizates containing different levels of CKRO were compared against the standard vulcanisate which was prepared by using 6 phr of aromatic oil used in the industry at present and all the tests were carried out according to the ISO standard test methods.