id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-13507		cet-13507		6	.pdf	application/pdf	3241	110	44	The oxygen permeability measurements revealed the improvement of the O2 barrier performance of the PBS/PVOH based films, thanks to the excellent barrier properties of PVOH: in particular, a decrease in PO2 values equal to 24 % and 42% for PBS/PVOH 80/20 and PBS/PVOH 60/40, respectively, was achieved with respect to neat PBS film. Absorption characteristic peaks of PVOH film are: - OH stretching at 3272 cm-1; asymmetric and symmetric stretching of CH2 groups at 2936 and 2902 cm-1 respectively; H-O-H bending of the absorbed water at 1644 cm-1; C=C stretching at 1538 cm-1; CH2 bending and wagging at 1415 cm-1 and 1324 cm-1, respectively; a peak imputable to the CO stretching is noticeable at 99 1138 cm-1, and identifies the crystalline sequence of PVOH (Tretinnikov and Zagorskaya, 2012) while the sharp peak at 1086 cm-1, referred to the C-O stretching and the OH bending, identifies the amorphous phase; finally, peaks due to CH2 rocking and C-C stretching are noticeable at 911 cm-1 and 827 cm-1, respectively (Jipa et al., 2012).	cache/cet-13507.pdf	txt/cet-13507.txt