Investigating the Effect of Aluminum Diethylphosphinate on Thermal Stability, Flame Retardancy, and Mechanical Properties of Poly(butylene succinate)

Poly(butylene succinate) is one of the most promising biodegradable polymers, but its applications are limited by poor flame retardancy. In this work, poly(butylene succinate)/diethylphosphinate (PBS/AlPi) composites were fabricated to investigate effect AlPi on their thermal stability, retardancy, and mechanical properties. It was found that high content decreased stability PBS, decrease became stronger under air atmosphere. When reached 25wt%, retardancy improved with oxygen index (LOI) 29.5%, V0 rating in UL-94 vertical burning test, 49.3% reduction peak heat release rate (PHRR) cone calorimeter test. Meanwhile, addition could improve properties PBS tensile strength Young’s modulus, which ascribed compatible maleic anhydride-grafted (PBS- g -MA) good filler dispersion strong matrix-particles interaction. Thus, an effective retardant so PBS/AlPi displayed excellent without seriously sacrificing other comprehensive performances.