溴-锑阻燃体系对β-PP结晶和阻燃性能的影响

摘要

通过添加喹吖酮 β成核剂和溴-锑阻燃体系获得阻燃 β晶型聚丙烯（β-PP）。运用差示扫描量热仪和锥形量热仪研究了溴-锑阻燃体系对β-PP结晶性能和阻燃性能的影响。结果表明：低含量的八溴醚对 β晶有较强的抑制作用，随着八溴醚含量的增大，其对 β晶的抑制作用减弱，并在质量分数14%以上转变为促进作用，而Sb2O3在各种含量下对 β晶都有较强的抑制作用。溴-锑阻燃体系对 β晶的影响随体系中溴与锑之比而变化，含量大的起主导作用。此外，β晶的变化对溴-锑并用体系处理β-PP的阻燃效果无影响。%The flame retardant βcrystalline form polypropylene (β-PP) was prepared by adding β-nucleating agent quinacridone and bromine-antimony flame retardant system to the compound. The effect of bromine-antimony flame retardant system on the crystalline properties and flame retardancy of β-PP were studied by using differential scanning calorimeter (DSC) and cone calorimeter. The results show that tetrabro-mobisphenol A bis(2,3-dibromopropyl ether)(TBAB) strongly inhibits the formation of β crystalline at lower loading levels, while the inhibition is gradually weakened with the increase in loading level, and TBAB with mass percentage of over 14% becomes a facilitator for forming βcrystalline. Antimony oxide strongly inhibits the βcrystalline formation at any loading levels. The influence of the bromine-antimony system on the formation of βcrystal depends on the relative proportion of bromine to antimony, and the one in higher content plays a dominant role. In addition, the flame retardant efficiency of the bromine-antimony system treated β-PP is not affected by the variation of the β formation.