Title of article :
The detailed analysis of the vinylidene structure of metallocene-catalyzed polypropylene
Author/Authors :
Kawahara، نويسنده , , Nobuo and Kojoh، نويسنده , , Shin-Ichi and Toda، نويسنده , , Yoshihisa and Mizuno، نويسنده , , Akira and Kashiwa، نويسنده , , Norio، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2004
Abstract :
The vinylidene structures in polypropylenes produced by ethylenebis(indenyl)zirconiumdichloride (En(Ind)2ZrCl2), 1, and isopropyl(cyclopentadienyl)(fluorenyl)zirconiumdichloride (iPr(Cp)(Flu)ZrCl2), 2, were analyzed by 1H NMR. The vinylidene group adjacent to the chain end was clearly distinguished from other internal vinylidene structures for the first time using 1,2-dichlorobenzene as solvent. The polypropylene produced by 2 had much internal vinylidene groups compared with one by 1.
Keywords :
metallocene catalyst , Polypropylene , Analytical characterization
