A P-substituted sulfonyl-containing compound was synthesized in the lab. The structure of the compound was demonstrated by 1H and 31P NMR. The propylene polymerization catalysts were prepared by incorporating an inter...A P-substituted sulfonyl-containing compound was synthesized in the lab. The structure of the compound was demonstrated by 1H and 31P NMR. The propylene polymerization catalysts were prepared by incorporating an internal donor, and the content of Ti, H and C in the catalysts was also checked by elemental analysis. The effect of dosage of the donor, the Al/Ti ratio and the polymerization temperature on the catalyst activity were studied, the results suggested that the dosage of donor, the Al/Ti ratio and the polymerization temperature could affect not only the activity of catalyst but also the isotacticity index of the polymer. A catalyst with high activity was selected, and the polypropylene formed in the presence of this catalyst had high isotacticity index.展开更多
Three sulfonyl aliphatic amines [(R2SO2)2NR1 , viz.: compound 1, in which R1 =Me, and R2 =Ph; compound 2, in which R1=n-Bu, and R2 =CF3 ; and compound 3, in which R1 =C8H17 , and R2 =CF3], have been synthesized and em...Three sulfonyl aliphatic amines [(R2SO2)2NR1 , viz.: compound 1, in which R1 =Me, and R2 =Ph; compound 2, in which R1=n-Bu, and R2 =CF3 ; and compound 3, in which R1 =C8H17 , and R2 =CF3], have been synthesized and employed as internal electron donors (IED) for the preparation of Ziegler-Natta catalysts for the polymerization of propylene. The contents of Ti, H and C in these catalysts have been determined by elemental analysis and UV-vis spectrophotometry. The effect of the structure and dosage of the electron donor, the Al/Ti ratio and the polymerization temperature on the catalyst performance has been studied. Under optimized conditions, the catalyst with a highest activity yielded polypropylene with high isotacticity in the absence of external electron donors.展开更多
基金the PetroChina Science & Technology Management Department for the financial support (No.2010F-19)
文摘A P-substituted sulfonyl-containing compound was synthesized in the lab. The structure of the compound was demonstrated by 1H and 31P NMR. The propylene polymerization catalysts were prepared by incorporating an internal donor, and the content of Ti, H and C in the catalysts was also checked by elemental analysis. The effect of dosage of the donor, the Al/Ti ratio and the polymerization temperature on the catalyst activity were studied, the results suggested that the dosage of donor, the Al/Ti ratio and the polymerization temperature could affect not only the activity of catalyst but also the isotacticity index of the polymer. A catalyst with high activity was selected, and the polypropylene formed in the presence of this catalyst had high isotacticity index.
基金the PetroChina for the financial support(Contract Number:08-07-01-20)
文摘Three sulfonyl aliphatic amines [(R2SO2)2NR1 , viz.: compound 1, in which R1 =Me, and R2 =Ph; compound 2, in which R1=n-Bu, and R2 =CF3 ; and compound 3, in which R1 =C8H17 , and R2 =CF3], have been synthesized and employed as internal electron donors (IED) for the preparation of Ziegler-Natta catalysts for the polymerization of propylene. The contents of Ti, H and C in these catalysts have been determined by elemental analysis and UV-vis spectrophotometry. The effect of the structure and dosage of the electron donor, the Al/Ti ratio and the polymerization temperature on the catalyst performance has been studied. Under optimized conditions, the catalyst with a highest activity yielded polypropylene with high isotacticity in the absence of external electron donors.
