Fig. 1From: Quantifying the fragmentation of polypropylene upon exposure to accelerated weatheringAverage particle size for A PP particles with stabilizer and B PP particles without stabilizer. The induction phase, characterized by the presence of Irgafos® 168 and Irganox® 1010, is highlighted in yellow. Degradation proceeds in an exponential manner with τ = 149 h for PP with and τ = 427 h for PP without stabilizer (∝ exp(− t/τ))Back to article page