Polymer stabilizers: Structure, development and performance estimated changed with the thermal stability of polymer/MMT or NanoG composite pp.845-852
Authors: (Zunli Mo, Ruibin Guo, Huafeng Shi, College of Chemistry and Chemical Engineering, Northwest Normal University, China)
Abstract: Polymers, due to their versatility, have become the essential ingredients to provide a better quality of life. Industry is permanently facing significant economic, environmental and societal challenges. The accumulation of plastics in the environment is a matter of great concern leading to long-term environmental, economic and waste management problems. Degradation of waste plastics through various means becomes one of the alternatives to deal with such problems. Stabilization of polymer material continues to be an important technical field with a lot of industrial and scientific attention. Future developments in the field of polymer stabilization need to reflect the corresponding economic requirements . Changes in polymer properties due to chemical, physical or biological reactions resulting in bond scissions and subsequent chemical transformations are categorized as polymer degradation . Degradation reflects changes in material properties such as mechanical, optical or electrical characteristics in crazing, cracking, erosion, discoloration and phase separation. Depending upon the nature of the causing agents, polymer degradations have been classified as photo-oxidative degradation, thermal degradation, ozone-induced degradation, mechanochemical degradation, catalytic degradation and biodegradation . For example, polymers that are used outdoors suffer photo-oxidation promoted by exposure to the ultraviolet (UV) component of sunlight, leading to molecular chain scission and/or crosslinking. Some of the products of the chain reactions that occur during photo-oxidation are themselves prodegradants.