MgCl_2晶型对丙烯聚合MgCl_2载体催化剂活性的影响

EFFECTS OF CRYSTAL MODIFICATIONS OF MgCl_2 ON PERFORMANCE OF SUPPORTED CATALYST FOR PROPYLENE POLYMERIZATION

ＭｇＣｌ_２晶型对丙烯聚合ＭｇＣｌ_２载体催化剂活性的影响张明辉，肖世镜中国科学院化学研究所，北京，１００８０）关键词丙烯聚合、ＭｇＣｌ２、载体催化剂近年来，有关ＭｇＣＩ。载体催化剂的研究报道和综述文章不少，但涉及载体晶型对催化剂结构性能的影响却少见．...

he influence of MgCl2 crystal modification (α- MgCl2, β- MgCl2 ) on theproperties of supported catalyst for propylene polymerization has been studied bymeans of XRPD, IR and DTA-TG. The structural difference and similarity between α- MgCl2 and β- MgCl2 was still reclined in its milling produCt withdiisobutyl phthalate and in the catalysts prepared from α- MgCl, and β-MgCl2caaccers respectively. β-MgCl2 supported catslyst gives higher activity and lowerstcreospedficity than α- MgCl2. The catalyst prepared by using Mg (OEt)2 as carriershows higher activity and stereosghfidty than both α- MgCl2 and β- MgCl2 supported catalysts.