Abstract - Effect of soluble non-rubber elements and preliminary processing on water-rubber balances


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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 Effect of Soluble Non-rubber Elements and Preliminary Processing on Water-rubber Balances Natural rubber comprises around 90% cis-1,4 polyisoprene and 10% various substances (non-rubber elements). These non-rubber elements (proteins, metal ions, etc.) can effect the quality of rubber articles by increasing their water absorption capacity and decreasing their resistance to ageing. The effect of non-rubber elements on water-rubber thermodynamic equilibrium was examined by comparing the desorption isotherms for rubbers from two clones (AF 261 and GT 1), after various types of processing. The study revealed a significant difference in the water content at equilibrium depending on the treatment and the clone; the major role of soluble proteins extractable by simple washing, in the water retention process; and the lack of any correlation between nitrogen and water content at equilibrium.
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