Characterisation of rubber particle destabilisation by B-serum and bark sap of Hevea brasiliensis
1989
Yeang, H. Y.
Destabilisation of rubber particle suspensions as indicated by their flocculation, creaming and coagulation can be induced by the addition of small quantities (8%) of either B-serum or bark sap of Hevea brasiliensis. The responses elicited depended on the presence of C-serum, the concentration of rubber particles and the source of the rubber particles (whether they were low or high density particles) in the suspensions. Under appropriate conditions, instantaneous flocculation of rubber panicles can be induced by B-serum or bark sap. The rapidity of this response was consistent with its possible involvement in latex vessel plugging. The destabilisation of rubber particles by B-serum was markedly inhibited when C-serum was present in the suspension whereas destabilisation was largely unaffected when induced by bark sap. In fact, coagulation could be induced by bark sap only in the presence of C-serum. The denser rubber particles from Zone 2 of centrifuged latex were more sensitive to destabilisation than those from Zone 1 which constituted the major proportion of the rubber in latex.
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