g): Variation of the plastic starch tensile strength with the content of amylose Figures 2(a) and (b) show the 3% natural wood cellulose fiber reinforced plasticized normal starch injection molded bar. Figure shows the change of the tensile strength of the spline, the tensile strength increases from 1.38 MPa to 1.99 MPa, and the tensile strength increases 44.2%. This is mainly due to the fact that natural fibers and starch have the same monomer structure, plasticizers have a plasticizing effect on both, and plasticized starch and plasticized fibers have better compatibility.