Effect of Enzymatic Discoloration Inhibitor on Plasticity Retention of Sole Crepe Rubber

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dc.contributor.authorSomarathna, W.D.S.P.
dc.date.accessioned2021-05-17T06:43:17Z
dc.date.available2021-05-17T06:43:17Z
dc.date.issued2013
dc.description.abstractDurability of rubber product 4s very important to customer. As well as manufacture of rubber products try to protect good properties throughout the consuming time period of the product Durability of raw rubber product is affected aging properties. According to time, most of raw rubber is degradation which is leaded to reduce the properties of raw rubber and less performance of the product. Thermal oxidation is one of badly effect the aging property of raw rubber product. The rubber molecular weight of product will be reduced from thermal oxidation. Resistance to thermal oxidation is measured by plasticity retention index. Sole crepe rubber manufacturing industry always tries to produce higher grade sole crepe. Colour, clearness and purity are affected to grading parameters for sole crepe rubber industry. The colour of sole crepe rubber is manly affected enzymatic discoloration of the natural rubber latex which is complex process. In sole crepe manufacturing industry under fractionation step, Sodium matabisulfite (enzymatic inhibitor) is used to prevent enzymatic discoloration. Through the process, resistance of oxidative components is removed with yellow fraction. As a result plasticity retention index also significantly reduced. Increasing the dosage of Sodium matabisulfite the value of plasticity retention index is reduced. If is not used fractionation process to sole crepe manufacturing process the plasticity retention index is not reduced. Clone is also effected to plasticity retention index to sole crap rubber. Clones of less yellow fraction (RRIC 121 and PB 86) can be treated less dosage of Sodium matabisulfite. Then less effect to plasticity retention index from of Sodium matabisulfite. Kay word: Plasticity retention index, Sodium matabisulfite, Sole crepe, Colour, Effecten_US
dc.identifier.otherUWU/PLT/09/0043
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/6720/UWULD%20PLT%2009%200043-18042019094721.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;UWU/PLT/09/0043
dc.subjectPalm and Latex Technology and Value Addition Degree Programme ( PLT)en_US
dc.titleEffect of Enzymatic Discoloration Inhibitor on Plasticity Retention of Sole Crepe Rubberen_US
dc.title.alternativeResearch Article – PLT 2013en_US
dc.typeThesisen_US
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