Abstract
The purpose of this study was to investigate the oxygen scavenging properties of TiO2 catalyzed hydroxyl terminated polybutadiene (HTPB) blends with low density polyethylene (LDPE) and polylactic acid (PLA) matrices, prepared by melt extrusion. SEM images performed on prepared cast films demonstrated homogenously dispersed domains of HTPB in both matrices. In LDPE/HTPB blends, a hydrocarbon wax was added to overcome the undesirable phase separation.The oxygen absorption measurements successfully verified the photocatalytic activity of TiO2 to catalyze the oxidation of HTPB which led to a proper oxygen scavenging efficiency in our blends. The oxygen absorption of the blends increased by the addition and increasing the composition of TiO2 catalyzed HTPB. The final absorption reached about 30 and 27 cc/g after 30 days for the films containing 10 and 13 wt% HTPB in LDPE and PLA matrices, respectively.
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