A series of alkylaluminoxanes(TEAO, BTEAO, TAAO and BEBAO) were synthesized by hydrolysis of aluminium alkyls and modified with para-fluorophenylboric acid. Their cocatalytic performances, especially their effects on ...A series of alkylaluminoxanes(TEAO, BTEAO, TAAO and BEBAO) were synthesized by hydrolysis of aluminium alkyls and modified with para-fluorophenylboric acid. Their cocatalytic performances, especially their effects on molecular weight and molecular weight distribution of polyethylene catalyzed by{ 2C 5H 3N}FeCl 2(Ar=2,6-diisopropylphenyl) (1) were studied. Under the action of iron-based catalyst together with all of the four alkylaluminoxanes linear high-density polyethylene with broad or bimodal molecular weight distribution was formed, and the molecular weight and molecular weight distribution of polyethylene could be adjusted to some extent by changing n(Al)/n(Fe) ratios and architecture of aluminoxanes.展开更多
提出一种以相对分子质量分布为指标,关联熔体流动速率(MFR)的高密度聚乙烯(HDPE)工业生产过程流程模拟方法。基于Innovene S HDPE装置工业生产中的聚合过程,采用流程模拟软件Aspen Plus Polymers建立基于严格过程机理的HDPE过程框架模型...提出一种以相对分子质量分布为指标,关联熔体流动速率(MFR)的高密度聚乙烯(HDPE)工业生产过程流程模拟方法。基于Innovene S HDPE装置工业生产中的聚合过程,采用流程模拟软件Aspen Plus Polymers建立基于严格过程机理的HDPE过程框架模型,结合工业操作参数及实验数据,计算聚合物相对分子质量、相对分子质量分布指数,并关联MFR,利用TableCurve软件拟合得到HDPE的MFR模型。通过相对分子质量和MFR随氢气用量变化的灵敏度分析,在乙烯用量一定的条件下,氢气流量为0.20~0.45 kg/h,生产的相对分子质量分布呈双峰的管材专用HDPE PN049-030-122为优等品。展开更多
基金National Natural Science Foundation of China(Grant No.U1162202,21206037)"863"National High Technology Research and Development Program of China(Grant No.2013AA040701)+1 种基金the Natural Science Foundation of Shanghai(Grant No.13ZR1411500)Fundamental Research Funds for the Central Universities~~
文摘A series of alkylaluminoxanes(TEAO, BTEAO, TAAO and BEBAO) were synthesized by hydrolysis of aluminium alkyls and modified with para-fluorophenylboric acid. Their cocatalytic performances, especially their effects on molecular weight and molecular weight distribution of polyethylene catalyzed by{ 2C 5H 3N}FeCl 2(Ar=2,6-diisopropylphenyl) (1) were studied. Under the action of iron-based catalyst together with all of the four alkylaluminoxanes linear high-density polyethylene with broad or bimodal molecular weight distribution was formed, and the molecular weight and molecular weight distribution of polyethylene could be adjusted to some extent by changing n(Al)/n(Fe) ratios and architecture of aluminoxanes.
文摘提出一种以相对分子质量分布为指标,关联熔体流动速率(MFR)的高密度聚乙烯(HDPE)工业生产过程流程模拟方法。基于Innovene S HDPE装置工业生产中的聚合过程,采用流程模拟软件Aspen Plus Polymers建立基于严格过程机理的HDPE过程框架模型,结合工业操作参数及实验数据,计算聚合物相对分子质量、相对分子质量分布指数,并关联MFR,利用TableCurve软件拟合得到HDPE的MFR模型。通过相对分子质量和MFR随氢气用量变化的灵敏度分析,在乙烯用量一定的条件下,氢气流量为0.20~0.45 kg/h,生产的相对分子质量分布呈双峰的管材专用HDPE PN049-030-122为优等品。
