Aging of microplastics affects their surface properties, thermal decomposition, additives leaching and interactions in simulated fluids.Most microplastics (MPs) have undergone extensive aging in the environment.  Thermal decomposition of pigments and polyethylene occurred in temperature ranges of 340-406 °C and 406-550 °C, respectively.  Mono (di)-alkenes and saturated alkanes were the thermal decomposition products of polyethylene. 
THERM