Research on Production of Non-halogen Fire Retardant Polypropylene Composite

In order to prepare better fire-retardant polypropylene composites without reducing its mechanical properties,a large number of inorganic compounds were added to improve its flame retardant properties,the macromolecular flexibilizer was added to improve the toughness of the system,and macro-molecular grafting agents were added to improve the interaction between the polymer and inorganic particles;therefore,the loss of mechanical properties caused by adding a large number of inorganic flame retardants was compensated.When the ratio of MH∶ATH is 4∶1,ZB is 35 gram,P is 65 gram,the flame-retardant properties of materials meet UL94 V-0 requirements,and the mechanical properties are also well.When the toughness reinforcing agent system of POE∶EPDM is 110∶30,the properties of composites have been greatly improved.The tensile-strength can be up to 19.35 MPa,the breaking-strength can be up to 350.47 %,the impact strength can be up to 35.23 kJ/m2,and flame-retardant properties maintain at V-0 rate of vertical combustion rate UL-94.So,the inorganic flame retardant MH,ATH,P and ZB can be used together to achieve better flame retardancy.By adding the macromolecular compatibilizer to the PP system of halogen-free flame retardant for toughening.PP composites can achieve better fire-retardant properties and mechanical properties.