Polymerization of Acrylonitrile with(Diisopropylamido) Bis(indenyl) Lanthanides  

作　　者：李刚 张学全 应来强 巴小微 崔冬梅 唐涛 张学全 金鹰泰 

出　　处：《Journal of Rare Earths》2002年第5期538-540,共3页稀土学报（英文版）

基　　金：ProjectsupportedbytheKeyLaboratoryofPolymerPhysicsandChemistryinChineseAcademyofSciencesandtheJointFoundationofPolymerChemistryLaboratoryofChineseAcademyofSciencesandChinaPetro ChemicalCorporation

摘　　要：The polymerization of acrylonitrile was studied using (diisopropylamido)bis(indenyl) lanthanides, Ind 2LnN(i Pr) 2(Ln=Y, Yb) as a single component catalyst. The effects of the amount of catalyst, monomer concentration and polymerization temperature on catalytic activity and molecular weight of polyacrylonitrile(PAN) were studied. The results show that the catalytic activity is raised obviously with rising polymerization temperature. The monomer conversion reaches 64% under polymerization temperature, monomer concentration and catalyst concentration are 50 ℃, 5.1 mol·L -1 and 0.3%(molar ratio) sequentially. The conversion and molecular weight of the polymer increase appreciably with adding additive, PhONa. When the molar ratio of PhONa to the catalyst is three, the conversion and the molecular weight is 76% and 1.32×10 4, respectively. The initiation mechanism for the polymerization of acrylonitrile was proposed.The polymerization of acrylonitrile was studied using (diisopropylamido)bis(indenyl) lanthanides, Ind 2LnN(i Pr) 2(Ln=Y, Yb) as a single component catalyst. The effects of the amount of catalyst, monomer concentration and polymerization temperature on catalytic activity and molecular weight of polyacrylonitrile(PAN) were studied. The results show that the catalytic activity is raised obviously with rising polymerization temperature. The monomer conversion reaches 64% under polymerization temperature, monomer concentration and catalyst concentration are 50 ℃, 5.1 mol·L -1 and 0.3%(molar ratio) sequentially. The conversion and molecular weight of the polymer increase appreciably with adding additive, PhONa. When the molar ratio of PhONa to the catalyst is three, the conversion and the molecular weight is 76% and 1.32×10 4, respectively. The initiation mechanism for the polymerization of acrylonitrile was proposed.

关 键 词：rare earths lanthanide amides ACRYLONITRILE POLYMERIZATION 

分 类 号：O643.3[理学—物理化学]