The dispersion of filler in the rubber matrix was observed using a
Cryo ESEM (model—Zeiss EVO-18, Special Edition) after sputter coating
the surfacewith gold. Scanning electron microscopic analysis of samples
was done in ZEISS, EVO 18 special edition systemoperated at 20 kV. The
powder sample was dispersed in acetone by sonication for 30 min and
drop casted on the surface of metal grid covered with carbon tape and
dried. The sample containing grid was sputter coated with gold and
kept in vacuumchamber. SEMmicrographs of the sampleswere obtained
at magnifications ranging from 500 to 20,000.