Preparation and Study of Intumescent Flame Retardant Poly(butylene succinate) Using MgAlZnFe-CO_3 Layered Double Hydroxide as a Synergistic Agent

摘要

Intumescent flame retardant consisting of ammonium polyphosphate and melamine, and MgAlZnFe-CO_3 layered double hydroxides (LDHs) prepared by the constant pH coprecipitation method, were added to poly(butylene succinate) (PBS) via melt blending to obtain novel intumescent flame retardant poly(butylene succinate) (IFR-PBS) composites. A study on the effect of MgAlZnFe-CO_3 LDHs on the mechanical, thermal, and flame retardancy properties of IFR-PBS composites was investigated. It was revealed that IFR-PBS composites exhibited both excellent flame retardancy and antidripping properties when the content of MgAlZnFe-CO_3 LDHs was 1 (the total loading of flame retardant was 20), for a goal of vertical flammability (UL-94) V-0 rate and a limiting oxygen index value of 35. The results showed that a suitable amount of MgAlZnFe-CO_3 LDHs had a noticeable synergistic effect on IFR-PBS composites. Importantly, tensile strength and flexural strength were improved by the presence of MgAlZnFe-CO_3 LDHs.