Modified PBT material containing bio-based halogen-free flame retardant and preparation method thereof

The invention relates to the technical field of high polymer materials, in particular to a modified PBT (polybutylene terephthalate) material containing a bio-based halogen-free flame retardant and a preparation method of the modified PBT material. The composite material is prepared from the following components in percentage by mass: 42.7 to 74 percent of PBT, 20 to 30 percent of glass fiber, 15 to 20 percent of cyclodextrin coated aluminum hypophosphite, 0 to 5 percent of MCA, 0.3 to 0.8 percent of antioxidant, 0.5 to 1.0 percent of lubricant, 0.2 percent of anti-dripping agent and 0 to 0.3 percent of coupling agent. Compared with the prior art, the PBT modified material containing the bio-based halogen-free flame retardant obtained in the invention not only can reach the flame retardant UL94V-0 level, the tensile strength can reach 96 MPa, the bending strength can reach 140 MPa, the cantilever beam notch impact strength can reach 8.5 KJ/m < 2 >, and the CTI can reach 500 V, but also the flame retardant par