Glycerol (>97% purity) was used as a plasticizer and was purchased from Sigma Aldrich . Paper packaging having a grammage of 79.15 ± 0.89 g/m2 and a thickness of 99.2 ± 1.40 m at 23 ◦C and 50% RH, was provided from SOTEFI.
Glycerol (>97%purity) was used as a plasticizer and was purchased from SigmaAldrich . Paper packaging having a grammageof 79.15±0.89 g/m2 and a thickness of 99.2±1.40 m at 23 ◦C and50% RH, was provided from SOTEFI.