Tannic acid  (ppm) Tensile Strength (MP) Elongation at break (%) Young’s modulus (GPa)
0 33.63 ± 0.74d 27.1 ± 4.2a 0.395 ± 0.042c
250 34.96 ± 0.33c 22.1 ± 2.5b 0.402 ± 0.061b
500 35.33 ± 0.43b 18.4 ± 4.1c 0.413 ± 0.024b
1000 37.22 ± 0.95a 11.3 ± 3.8 0.491 ± 0.054a
Letters in table (a,b,c,d) presenting the tolerances of 0.05%.
Table 2: Effect of different concentration of tannic acid of mechanical properties of film.