2. Experimental
2.1. Materials
PBS resin (Natureplast PBE003, film grade) in the form of pellets
(3 mm) was kindly provided by Natureplast (France) for the preparation
of the degraded samples. Prior any characterization, PBS
grades were dried at 80 C for 5 h. The examined polymer antioxidants
were Irganox® 1010 (I1010) and Irgafos® 168 (I168) kindly
provided by BASF SE Ludwigshafen (Germany) and were added in
the form of masterbatch in PBS at final concentrations of 0.1 and
0.5% (w/w).
Other reagents were chloroform (purity 99.5%) (Chem-Lab,
Belgium), benzyl alcohol (BeOH) (Merck, Germany), tetra-nbutylammonium
hydroxide (TBAH) (Alfa Aesar, Germany) and
magnesium nitrate hexahydrate (MgNO3$6H2O) (Merck, Germany).