Alkali treated sisal fiber/NR composites exhibited higher mechanical
properties compared with untreated sisal fiber/NR composites at all fiber loadings due
to improved interfacial adhesion between the fiber and NR matrix through the
mechanical interlocking mechanism. However, cure time and scorch time of the
untreated sisal fiber/NR composites and alkali treated sisal fiber/NR composites were
not much different.