Table 7.

Barrier properties of films to oxygen and water vapor at 30% relative humidity (RH) and 23 °C.

Films	O2 Permeability Coefficient P × 1017 (kg·m·m−2·s−1·Pa−1)	Water Vapor Permeability Coefficient P × 1014 (kg·m·m−2·s−1·Pa−1)
PLA	2.2 ± 0.2 a	6.6 ± 0.8 a
PLA-g-TPCS	2.0 ± 0.1 a	6.6 ± 0.3 a
PLA-GRH	1.4 ± 0.1 b	6.1 ± 0.1 a
PLA-g-TPCS-GRH	0.9 ± 0.4 c	6.1 ± 0.7 a

Note: Within columns, values followed by a different letter are significantly different at p ≤ 0.05 (Tukey’s test).