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Extensional rheology of raw natural rubber from new clones of Hevea brasiliensis Lotti, C, Moreno, R, Goncalves, P, Bhattacharya, S and Mattoso, L 2011, 'Extensional rheology of raw natural rubber from new clones of Hevea brasiliensis', Polymer Engineering and Science, vol. 52, no. 1, pp. 139-148. Document type: Journal Article Collection: Journal Articles Title Extensional rheology of raw natural rubber from new clones of Hevea brasiliensis Author(s) Lotti, C Moreno, R Goncalves, P Bhattacharya, S Mattoso, L Year 2011 Journal name Polymer Engineering and Science Volume number 52 Issue number 1 Start page 139 End page 148 Total pages 10 Publisher John Wiley & Sons Abstract Natural rubber (NR) is a biopolymer whose properties depend on the molecular structure of the 1,4-cis polyisoprene chains, nonrubber constituents, environmental conditions, etc. NR has been characterized by Mooney viscosity, Wallace plasticity, nitrogen content (%N). However, these cannot effectively account for clone differences. The aim of this work is to use extensional rheology to characterize and differentiate NR samples as for clone type and the season of the year in comparison to the traditional characterizations. Three IAC 300 series and RRIM 600 clones of Hevea brasiliensis tapped between October 2006 (Oct_06) and August 2008 (Aug_08) were investigated. IAC 329 clones showed the least susceptibility to seasonal changes, whereas RRIM 600 was the most influenced. An opposite trend between extensional viscosity (gE) and %N was established. The former was very sensitive to changes in the molecular structure of NR, being fundamental for monitoring purposes and strategic development of new rubber tree clones. Subject Chemical Characterisation of Materials Keyword(s) Natural Rubber Extensional Rheology DOI - identifier 10.1002/pen.22056 Copyright notice © 2011 Society of Plastics Engineers ISSN 0032-3888 Related Links Link Description http://dx.doi.org/10.1002/pen.22056 Link to Published Version   Versions Version Filter Type Tue, 08 May 2012, 15:12:22 EST Wed, 18 Jun 2014, 21:50:23 EST Filtered Full Citation counts:   Cited 3 times in Thomson Reuters Web of Science Article | Citations Cited 6 times in Scopus Article | Citations Altmetric details: Access Statistics: 133 Abstract Views  -  Detailed Statistics Created: Tue, 08 May 2012, 13:52:00 EST by Catalyst Administrator