STUDY ON A MODIFIED BENZOXAZINE RESIN WITH GOOD FLAMERETARDANCY FOR HOT-MELT IMPREGNATION

Abstract

Abstract: The flame retardant matrixes used for hot melt impregnation were prepared by the blends of benzoxazine and trifunctional epoxy resin. Softening point and adhesion at room temperature of these resin systems were tested. Flame retardancy, Tg and flexural property of cured resins were studied. Results suggest that by adjusting the ratio, the adhesion of the system met the requirement of hot melt technique, and flame retardancy of the cured resins reached UL-94 V-1 grade. Furthermore, limited oxygen index value reached 33, and a glass transition temperature of 212℃ was shown. The flexural strength was as high as 131 MPa. Additionally, the change of the viscosity during curing was adjusted by adding resorcinol as a catalyst. When the addition amount of resorcinol was 2 wt%, the viscosity can meet the requirement during preparation of the composite material. So, a flame retardant benzoxazine resin used for hot melt impregnation was successfully prepared, and it can be used in the aerospace field.

Key words: hot-melt method, benzoxazine, flame retardancy, heat resistance

CLC Number:

ZHANG Qi, JING Mao, RAN Qi-chao, GU Yi. STUDY ON A MODIFIED BENZOXAZINE RESIN WITH GOOD FLAMERETARDANCY FOR HOT-MELT IMPREGNATION[J]. Fiber Reinforced Plastics/Composites, 2016, 0(2): 67-70.

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