Effect of Flame Retardant System on Flame Retardancy of PET

The effect of flame retardant system on the flame retardancy of PET The bromine and fluorene flame retardants have certain compatibility with PET resin and can be used for the flame retardancy of PET resin. It can be seen that the bromine-antimony and bromine-antimony-phosphorus flame retardants have good synergy, but the phosphorus-containing flame retardants will degrade the PET resin at the processing temperature and cause the degradation of the mechanical properties, so it is not suitable. Flame retardant for PET resin. Sample bromine flame retardant, antimony flame retardant, phosphorus flame retardant, oxygen index 21212 compatibilizer impact on the flame retardancy of PET resin. It can be seen that the compatibilizer can effectively increase the flame retardancy of the material, and the larger the amount, the better the flame retardant effect. In particular, the compatibilizer 2, in the case of only 5 and 2 parts of bromine-antimony flame retardant, 10 parts of the compatibilizer 2 can increase the oxygen index of the material from 23 to 28. It is usually necessary to add a small amount of antioxidants to Huang Jian et al.: The development of flame retardant PET/GF composites inhibits the oxidation and degradation of plastics at high temperatures. Sample brominated flame retardant, antimony flame retardant, antioxidant oxygen index sample glass fiber, talc, bromine flame retardant, antimony flame retardant, none 1) injection mold temperature is 45e, the rest is higher than 45e can be used in the sample The exothermic peak (cold crystallization peak) temperature T during the DSC temperature rise process and the exothermic peak (thermal crystallization peak) temperature T during the cooling process are used to characterize the effect of the nucleating agent on the crystallization rate of the PET. The closer the T value is to the glass transition temperature of PET (about 75e) or the closer the T value is to the melting point (about 250e), the better the nucleating effect of the nucleating agent is.

Sample 18 showed no T peak, indicating that the glass fiber can crystallize PET more perfectly under injection molding conditions. Sample 19 replaced the glass fiber with the same amount of talcum powder and the injection temperature was lower than that of sample No. 3, but the data showed that the heterogeneous nucleation tendency of talc was stronger than that of glass fiber.