基于均匀设计的苯乙烯分散聚合反应研究

本文基于均匀设计方法对苯乙烯的分散聚合反应进行了试验设计,并通过回归分析,建立了聚苯乙烯粒子相关性能参数(聚苯乙烯粒子分子量、粒径大小及分布)和各变量(单体浓度、稳定剂用量、引发剂用量和反应介质溶度参数)之间的回归方程。根据回归方程进行了分散聚合反应的配方优化,得到了约束条件下的苯乙烯分散聚合反应配方,实测值与预测值比较结果表明,回归方程的预测值与优化配方制备的PS粒子的各项性能实测值存在一定的偏差(相对偏差在15%以内),但仍对试验配方设计有一定的指导作用。

Study on dispersion polymerization of styrene based on uniform design

In this paper,the uniform design methods were used to arrange four-factor and eight-level experiment of dispersion polymerization of styrene,including monomer concentration,initiator concentration,stabilizer concentration and ratio of alcohol and water.The stepwise regression technique was adopted to analyze the test results.The mathematical modes between molecular weight,size and size distribution of PS and four influencing factors were established,and their reliabilities were evaluated.Although the predicted values from regression equation were different from the observed values(relative divergences were less than 15%),the regression equation could use for design of polystyrene particles and mechanism research.All above researches could use for optimization of dispersion polymerization reaction conditions.