Table 4: Tensile strength and tensile modulus of INI treated fiber/PP composites.

Tensile Strength (MPa) Tensile Modulus (GPa) INI treatments Mean Stdev. LSD Test Mean Stdev. LSD Test Untreated 46.77 3.43 A 1.70 0.20 A 100°C, 1 : 1 49.23 3.77 AB 1.88 0.11 B 100°C, 1 : 2 51.65 2.57 B 1.96 0.15 BC 130°C, 1 : 1 50.20 3.30 B 1.93 0.22 BCD 130°C, 1 : 2 51.61 2.51 B 2.05 0.11 DE 160°C, 1 : 1 51.41 4.33 B 2.14 0.22 E 160°C, 1 : 2 50.94 4.31 B 1.99 0.16 BE

1 : 1 and 1 : 2 means the molar ratio of Na2CO3 to CaCl2. Average of 27 samples. Means with the same letter are not significantly different at . Stdev: standard deviation of the mean.