STUDY ON THE FLAME RESISTANCES OF THE REACTIVE PHOSPHORUS-CONTAININGFLAME RETARDANT TO UNSATURATED RESIN

Abstract

Abstract: A reactive phosphorus-containing fire retardant, 2-hydroxyethyl methacrylate phosphate (HEMAP), was added to the unsaturated resin to improve its flame retardant properties. The cured unsaturated resin reached limiting oxygen index of 32.5 as added 5 parts of HEMAP. Thermal properties of unsaturated resin were studied by means of TG and DTG. Decomposition temperature of 10% mass loss and maximum weight loss both dropped with the increase of HEMAP from 0 to 20 parts by weight. However, formation of phosphorus-containing acid from decomposition of P-O-C bonds inhibited effectively further decomposition of the unsaturated resin. As the HEMAP content increased, the char yield increased from 3.8% to 31.4% at 800℃ in N₂ atmospheres, and the carbonaceous char yield increased from 0 to 4 at 500℃ in air atmosphere. The glass transition temperature (Tg) was measured by dynamic mechanical thermal analysis (DMA). The Tg of different unsaturated resins increased from 120.9℃ to 122℃ after added 5 parts of HEMAP.

Key words: reactive type, phosphorus-containing flame retardant, unsaturated resin, flame retardant

CLC Number:

TB332

CHENG Liu-feng, WANG Jun, LIU Wei. STUDY ON THE FLAME RESISTANCES OF THE REACTIVE PHOSPHORUS-CONTAININGFLAME RETARDANT TO UNSATURATED RESIN[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(3): 11-14.

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