The aim of the present research work is to develop expanded graphite (EG) and isocyanate modified
graphite nanoplatelets (i-MG) filled SBR/BR blends, which can substitute natural rubber (NR) in some
application areas. The present study investigated the ef fect of i-MG on the physical, mechanical and
thermo-mech anical properties of polybutadiene rubber (BR), styrene butadiene rubber (SBR) and SBR/
BR blends in the presence of carbon black (CB). Graphite sheets were modified to enhance its dispersion
in the rubber matrices, which resulting in an improveme nt in the overall physical and mechanical
properties of the rubber vulcanizates. Compounds based on 50:50 of BR and SBR with 3 wt% nanofillers
with CB were fabricated by melt mixing. The morphology of the filled rubber blends was investigated by
wide angle X-ray diffraction (WAXD) and high resolution transmission electron microscopic (HR-TEM)
analyses . The intercalated and delamin ated structures of the nanofiller loaded rubber blends were
observ ed. Scanning electron microscopic (SEM) analysis of the cryo-fractured surfaces of the rubber com-pounds showed more rough and tortuous pathway of the fractured surfaces compared to the fractured
surfaces of the only CB loaded rubber composites. Filled rubber compounds exhibit increase in the DS
(torque difference) value, reduced scorch and cure time compared to their respective controls. Dynamic
mechanical thermal analysis (DMTA) of the filled rubber compounds shows an increase in the storage
modulu s compared to the controls . Isocyanate modified graphite nanoplatelets (i-MG) containing rubber
comp ounds in the presence of CB showed an increase in the mechanical, dynamic mechanical, hardness,
abrasion resistance and thermal properties compared to the alone CB filled rubber vulcanizates.
The aim of the present research work is to develop expanded graphite (EG) and isocyanate modifiedgraphite nanoplatelets (i-MG) filled SBR/BR blends, which can substitute natural rubber (NR) in someapplication areas. The present study investigated the ef fect of i-MG on the physical, mechanical andthermo-mech anical properties of polybutadiene rubber (BR), styrene butadiene rubber (SBR) and SBR/BR blends in the presence of carbon black (CB). Graphite sheets were modified to enhance its dispersionin the rubber matrices, which resulting in an improveme nt in the overall physical and mechanicalproperties of the rubber vulcanizates. Compounds based on 50:50 of BR and SBR with 3 wt% nanofillerswith CB were fabricated by melt mixing. The morphology of the filled rubber blends was investigated bywide angle X-ray diffraction (WAXD) and high resolution transmission electron microscopic (HR-TEM)analyses . The intercalated and delamin ated structures of the nanofiller loaded rubber blends wereobserv ed. Scanning electron microscopic (SEM) analysis of the cryo-fractured surfaces of the rubber com-pounds showed more rough and tortuous pathway of the fractured surfaces compared to the fracturedsurfaces of the only CB loaded rubber composites. Filled rubber compounds exhibit increase in the DS(torque difference) value, reduced scorch and cure time compared to their respective controls. Dynamicmechanical thermal analysis (DMTA) of the filled rubber compounds shows an increase in the storagemodulu s compared to the controls . Isocyanate modified graphite nanoplatelets (i-MG) containing rubbercomp ounds in the presence of CB showed an increase in the mechanical, dynamic mechanical, hardness,abrasion resistance and thermal properties compared to the alone CB filled rubber vulcanizates.
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