Thermal Oxidation and Its Relation to Chemiluminescence from Polyolefins and Polyamides

摘要

Chemiluminescence (CL) from oxidation of polypropylene, polyethylene and polyamide has been compared and kinetic parameters based on the simplified kinetic scheme involving both bimolecular decomposition of hydroperoxides as an initiating event and correction for the oxidation spreading were determined. Induction times of oxidation determined from the autocatalytic shape of Chemiluminescence intensity-time runs increase with an increasing initial molar mass of polypropylene within low molar masses up to 180 kDa regardless of the route of the polypropylene synthesis. The more complex Chemiluminescence patterns in case of polyamides may be related with an increase of initially present defect structures including the terminal amino groups.