**2.8. Polymer composite production**

Polymer composite has strong and stiff fibers in a matrix which is weaker and less stiff compared to fiber. The quality of polymer composite is determined by their characteristic properties such as modulus of rupture (MOR), modulus of elasticity (MOE). The cake of jatropha and the shell were utilized for polymer composite production by Hrabě [24] and Raju [25]. Jatropha cakes were in two forms, *viz*., continuous (as epoxy adhesive) and discontinuous phase (as reinforcing particles). The filler moisture was 4.59 ± 0.22% wet basis. Raju [25] produced polymer composite by using jatropha shell as reinforcement and reported that 20 wt% of shell has maximum MOR of 40.57 MPa and 60 wt% of shell as reinforcement has maximum MOE of 8.204 GPa.
