{"title":"Viscosity, Relaxation and Stability of Natural Rubber","authors":"J. Maláč","doi":"10.2174/1874343900903010041","DOIUrl":null,"url":null,"abstract":"Mooney viscosity and Mooney relaxation of unaged and oven aged SMR L natural rubber samples were stud- ied. The viscosity was characterized by ML (1+4) 100°C and the rate of stress relaxation by the exponent a in a power law M = k (t) a . With the increasing time of oven aging at 140°C the decrease of both viscosity and stress relaxation rate expo- nent were observed. Aging of raw natural rubber can therefore be studied by Mooney viscosity and Mooney relaxation tests and obtained results are sensitive enough to be used for characterization of raw natural rubber stability.","PeriodicalId":22718,"journal":{"name":"The Open Macromolecules Journal","volume":"81 1","pages":"41-44"},"PeriodicalIF":0.0000,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Open Macromolecules Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2174/1874343900903010041","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
Abstract
Mooney viscosity and Mooney relaxation of unaged and oven aged SMR L natural rubber samples were stud- ied. The viscosity was characterized by ML (1+4) 100°C and the rate of stress relaxation by the exponent a in a power law M = k (t) a . With the increasing time of oven aging at 140°C the decrease of both viscosity and stress relaxation rate expo- nent were observed. Aging of raw natural rubber can therefore be studied by Mooney viscosity and Mooney relaxation tests and obtained results are sensitive enough to be used for characterization of raw natural rubber stability.
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