Figure 3From: New photostabilizers for polystyrene based on 2,3-dihydro-(5-mercapto-1,3,4-oxadiazol-2-yl)-phenyl-2-(substituted)-1,3,4-oxazepine- 4,7-dione compounds Changes in the viscosity-average molecular weight (Mv) during irradiation of PS films (40 μm) (blank) and with 0.5 wt% of additives. Back to article page