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The rubber latex particle morphology, size and also arrangements of various types of natural rubber latex are investigated in the latex state using Environmental Scanning Microscope (ESEM). Subsequently the changes in the morphology after film formation is observed using Field Emission Scanning Electron Microscopy (FESEM). Prior to film formation, in the latex state, epoxidised natural rubber showed marked differences in latex particle morphology and arrangement compared to high ammonia latex. Subsequently, after the films are formed, the microscopy results exhibited certain dissimilarities between high ammonia and epoxidised natural rubber latex films particularly particle clustering. It is revealed that the high ammonia natural rubber latex film showed distinctly larger spherical shaped latex particles at the surface of the films in contrast to the smaller latex particles as observed in the epoxidised natural rubber latex film. The present study provides insight into the differences in the film formation between high ammonia and epoxidised natural rubber latex, which may also influence the properties of the resulting rubber latex films and latex products.

LATEX PARTICLES MORPHOLOGY OF EPOXIDISED AND HIGH AMMONIA NATURAL RUBBER LATEX FROM ELECTRON MICROSCOPY TECHNIQUES