In comparison between alkalization and addition of the compatibilizers,
NR-g-MA provided the most effective improvement of the mechanical properties of
the sisal fiber/NR composites due to better adhesion between the sisal fiber and NR
matrix. The prolonged scorch time and cure time of the composites were observed at
the presence of NR-g-MA. However, with increasing NR-g-MA loading, the
mechanical properties, scorch time, and cure time of the sisal fiber/NR composites
were increased.