Solubility of high molecular weight,sterically hindered amines in polypropylene

The dissolution of four sterically hindered amines with molecular weights from 1364 to 2758 was studied in polypropylene in the interval, 60–130°C. The solubility of the additives at 100°C passes through a maximum during time and the maximum solubility increases with increasing additive molecular weight. The rearrangement of the polymer structure during additives dissolution is discussed. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 883–889, 2000