Abstract - Structural characterisation of the small rubber particles in fresh Hevea latex


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	Publications of MRB Latest Publications MRB Digest Journal of Rubber Research 3^rd Qtr 2008 Vol 11(3) 2^nd Qtr 2008 Vol 11(2) 1^st Qtr 2008 Vol 11(1) 4^th Qtr 2007 Vol 10(4) 3^rd Qtr 2007 Vol 10(3) 2^nd Qtr 2007 Vol 10(2) 1^st Qtr 2007 Vol 10(1) 1^st Qtr 2006 Vol 9(1) 2^nd Qtr 2006 Vol 9(2) 3^rd Qtr 2006 Vol 9(3) 4^th Qtr 2006 Vol 9(4) Submit paper/article Order Form	Abstract Structural Characterisation of the Small Rubber Particles in Fresh Hevea Latex The rubbers from small and large rubber particles were separated from the serum and cream phases of centriguged fresh Hevea latex, respectively. The small rubber particles (SRP) consist of rubber molecules showing a unimodal molecular weight distribution (MWD) with a peak-top value falling between the two peak values of the bimodal MWD observed in rubbers from the large rubber particles (LRP). The rubber in LRP from mature trees and SRP from seedlings are polyisoprene molecules terminated by phospholipids comprising branching points, while that in SRP are presumed to be linear molecules containing no phospholipid terminal. Comparative data of MW and structure between the SRP obtained from the serum phase of fresh latex and those of the SRP obtained from seedling latex are reported. The mechanism controlling MW in connection with the relationship among MW, branching, gel and particle size.
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