Thermal stability of poly(oxyalkylene)amine-grafted polypropylene copolymers

摘要: Abstract The thermal and thermo-oxidative degradation of a family amphiphilic copolymers consisting polypropylene (PP) backbone several poly(oxyethylene) /poly(oxypropylene) (POE/POP) pendants were investigated by using gravimetric analysis (TGA). Their relative stability was correlated to the chemical structures with respect POE versus POP in terminal functionalities. In comparing starting amines, molecular weight (Mw) types polymer main controlling factors for nitrogen, while amine contributed most air. amine-grafted PP copolymers, functional groups including tethered amine, quaternary sodium salt complexes significantly stabilized particularly oxidative condition. following trends air observed: PP-g-MA/EDA>PP-g-MA/DAP ≫ PP-g-MA/ED2001 PP-g-MA/M2070=PP-g-MA/D2000>ED2001>D2000=PEG2000>PPG2000; PP-g-MA/Na+>PP-g-MA. Under condition helium gas at 550°C, representative copolymer pyrolyzed into fragments olefins/dienes from as well vinyl ethers pendants, observed GC/mass spectroscopy. Reaction pathways thermooxidative these functionalized are discussed.