The disintegration of plastic materials by means other than by the biological process such as dissolving, heat ageing or ultraviolet ageing.
A diverse group of specialty chemicals incorporated into plastic formulations before or during processing, or to the surfaces of finished products after processing. Their primary purpose is to modify the behavior of plastics during processing or to impart useful properties to fabricated plastic articles. (Modern Plastics Encyclopedia 1995).
Degradation in the presence of air. Composting is a way of aerobic degradation.
American Society of Testing and Materials (ASTM)
The main standardization body for materials standards in the United States. Including materials standards and testing protocols for plastic sheeting.
Degradation in the absence of air, as occurs in dry landfills. Anaerobic degradation is also called biomethanization.