通过对Borstar双峰聚合反应过程产品性质实验分析,Borstar双峰聚乙烯技术超临界环管反应器生产聚合物熔融指数相对于分子量呈指数规律变化,气相反应器生产的聚合物熔融指数随分子量增加而呈一定规律的减少,聚合物分子量继续增加聚合物熔融指数减少趋势缓慢;在实验分析的基础上,基于聚合反应机理应用MATLAB软件建立工业装置聚合过程聚乙烯熔融指数及密度等产品性质计算模型和确定模型参数,通过模型拟合值和实际值的比较,模型能够准确预测熔融指数和密度的变化趋势,有关聚乙烯在环管中的熔融指数、在流化床内的熔融指数和密度的质量模型相对平均误差分别为2.4%,0.5%和0.3%。通过产品质量预测模型的推导和分析,环管部分熔融指数主要受温度、[H2]/[C2H4]影响;而气相部分熔融指数既受环管聚合物来料性质影响,又受气相反应器温度和[H2]/[C2H4]和[C4H8]/[C2H4]的影响 Borstar Bimodal polymerization process through the nature of the product experimental analysis, Borstar bimodal polyethylene technology supercritical loop reactor production of polymer melt index changes exponentially with molecular weight, the gas phase reactor production of polymer melt index increases with molecular weight On the basis of experimental analysis, based on the polymerization reaction mechanism, MATLAB software was used to establish the calculation model of product properties such as polyethylene melt index and density in the polymerization process of industrial plants And determine the model parameters, the model can accurately predict the change trend of the melt index and density by comparing the fitting value of the model and the actual value, the melt index of the polyethylene in the loop tube, the melt index and the density in the fluidized bed The relative average error of quality model was 2.4%, 0.5% and 0.3% respectively. Through the derivation and analysis of product quality prediction model, the partial melting index of the loop is mainly affected by the temperature [H2] / [C2H4]; while the partial melting index of the gas phase is affected by both the nature of the incoming material and the temperature of the gas phase reactor And [H2] / [C2H4] and [C4H8] / [C2H4]