Application of Nanometer Antimony Trioxide Modified by Dioctyl Phthalate in Polyvinyl Chloride Flame Retardant Materials

Abstract

In order to improve the compatibility and dispersion of antimony trioxide nanoparticles (nano-Sb 2 O 3 ) in polyvinyl chloride (PVC) and improve the comprehensive properties of PVC, a novel type of nano-Sb 2 O 3 /DOP/PVC composites was prepared by using nano-Sb 2 O 3 modified by dioctyl phthalate (DOP) as flame retardant and the mechanical properties and flame-retardant properties of the composites were studied. The results indicated that nano-Sb 2 O 3 particles modified by appropriate DOP could improve the flame retardancy and tensile strength of PVC matrix composites due to good dispersibility and interface compatibility of nano-Sb 2 O 3 in PVC matrix. The PVC matrix composites containing 2 wt% nano-Sb 2 O 3 particles modified by DOP with 5 wt% of usage had excellent flame retardancy, which LOI was 29.8% and its UL94 grade was V-0 level. And the heat release rate,smoke production rate, CO content and CO 2 content of the composites was significantly reduced. Meanwhile, the tensile strength and Young's modulus of the composites were 15.9 MPa and 2.1 GPa, respectively.

Thixotropic Behavior in Defining Particle Packing Density of Highly Filled AP/HTPB-Based Propellant

“…As the agglomerate is weakened, it is easier to be broken into a smaller agglomerate. The ability of plasticizer in breaking and modifying the size of agglomerates is proven in the field of flame-retardant materials [55], nanocomposites [56], and processing minerals [57]. The small agglomerates are aligned on the liquid to flow and it is suggested as the mechanism of plasticizer in lowering viscosity [29], described in Figure 12c.…”