weight loss

Degradation Assessment of Flexible Polyurethane Foam Composites Based on Palm Oil in Soil

This paper presents information on a comparison of the degradation of a flexible palm oil-based polyurethane foam with a commercial flexible polyurethane foam (control) in soil over a period of 30 days. The sample used in this study was a composite polyurethane foam containing about 50-60% palm oil polyol and has characteristics similar to conventional polyurethane foam. The novelty of this study is to investigate the degradation rate of a composite flexible polyurethane foam with a palm oil polyol content of 50-60%.

Degradation of Poly(3-hydroxybutyrate) and its Derivatives: Characterization and Kinetic Behavior

We focused on hydrolytic degradation kinetics at 310 and 343 K in phosphate buffer to compare PLA and PHB kinetic profiles. Besides, we revealed the kinetic behavior for copolymer PHBV (20 % of 3-hydroxyvalerate) and the blend PHB-PLA (1:1). The intensity of biopolymer hydrolysis is characterized by total weight lost and the viscosity-averaged molecular weight (MW) decrement. The degradation is enhanced in the series PHBV < PHB < PHB-PLA blend < PLA.