| Sb2O3was modified by titanate and the application of modified-Sb2O3was studied in this article. The activation index, viscosity, Fourier transform, infrared spectroscopy, scanning electron microscopy and other means of method were used to characterize the modified Sb2O3. And the dispersion and compatibility of the modified Sb2O3in PP were investigated by preparing masterbatch of Sb2O3through SEM. At the same time, the mechanical properties, combustion properties, thermal stability of flame-retardancy PP composites were tested, while the disperse property of modified Sb2O3in PP and the effect of Sb2O3to PP were studed. Meanwhile, several flame retardant smoke suppressants, composited with the modified Sb2O3in PP composites, were inspected the compound capacity between the modified Sb2O3and the different flame retardant smoke suppressants. The contents and conclusions were studied as follows:(1) Surface modification of Sb2O3by titanate coupling agentTitanate NDZ-101and titanate NDZ-311were respectively used to modify the surface of Sb2O3powder. The effect of dosage, reaction temperature, reaction time of Titanate NDZ-101and titanate NDZ-311on the surface modification of Sb2O3were studied. The best modified conditions of the two titanate coupling agents were found:the amount of coupling agent is3%, the reaction temperature is70℃, reaction time is40min. The chemical bonding occurs between Titanate and the surface of the antimony oxide. The dispersion performance of modified Sb2O3was improved after being modified.(2) Study on the dispersion of modified Sb2O3in polymer matrixDifferent contents of SD2O3masterbatch were prepared, and the surface shapes were analyzed by scanning electron microscopy. It is shown that the modified Sb2O3powders were dispersed well in the PP. And the effects of the amount of modified Sb2O3to the composites’ properties were studied. The results showed that the modified antimony oxide composite with DBDPE were effectively reduced the quality loss of the PP, improving the performance of the thermal decomposition of PP resin, and the maximum decomposition temperature of composite material was declined by23℃.(3) Study on the function of modified Sb2O3compositeThe compounding capacity between modified Sb2O3and several different flame-retardants and smoke suppressants in PP were studied, and the results concluded as follows:after adding20Flame Retardant and Smoke Suppressants, the tensile strength, flexural strength, flexural modulus, heat distortion temperature and Shore hardness were increased, while the elongation at break and Charpy notched impact strength, Izod anti-The impact strength were decreased. The horizontal and vertical level of the composites were reached to V-0, but the flame retardant and smoke suppressant contribution rate on the oxygen index was negative. TG tests have shown that aluminum hydroxide, aluminum hydroxide:magnesium hydroxide=3:1, mixed materials, zinc oxide, zinc borate could effectively inhibit the thermal decomposition of polypropylene (PP) and T1, T5, T10were respectively improved. The magnesium hydroxide does not inhibit the burning before the PP decomposed, and the T1, T5, T10of composites were not changed significantly. However, the temperature of thermal weightlessness was declined by adding hydrotalcite, because it can decompose into water. DTA tests have shown that when adding20aluminum hydroxide, magnesium hydroxide and aluminum hydroxide:magnesium hydroxide=3:1of mixed materials, zinc oxide, hydrotalcite, zinc borate, respectively, the exothermic effect of PP has been effectively restrained, and exothermic peak of the composite around280℃was significantly weakened, while the other exothermic peak has also been delayed and rendered more acute. |
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