关键词: 乙烯-醋酸乙烯共聚物, 硅酸盐纳米短纤维, 无卤阻燃

Abstract: The non-halogen flame retardant EVA composite containing magnesium hydroxide [Mg(OH)2] and microencapsulated red phosphorus (MRP) was prepared. EVA-g-MAH and silicate nanofiber (SNF) have also been used to improve the flame retardancy and mechanical property of EVA. Limiting oxygen index and thermal gravimetric (TG) analysis have been used to characterize the flammability and thermal behavior of EVA composites. The morphology of the composite has been observed and analyzed by SEM. It was found that the presence of EVA-g-MAH could improve the limiting oxygen index and mechanical properties. The composite containing 12 phr EVA-g-MAH has a limiting oxygen index value of 39% , the tensile strength of 10.2 MPa and the elongation at break of 521 % . When the loading of SNF was 20 phr, the limiting oxygen index reached 38%, the horizontal flame test reached V-0 level, the tensile strength reached 12.3 MPa, and the elongation at break reached 210 %.

Key words: ethylene-vinyl acetate copolymer, silicate nanofiber, non-halogen flame retardancy