Synthesis of Hydroxyl Group Containing Polyolefins with Metallocene/Methylaluminoxane Catalysts

• Published in: Macromolecules Vol. 29; no. 16; pp. 5255 - 5260
• Main Authors: Aaltonen, Päivi, Fink, Gerhard, Löfgren, Barbro, Seppälä, Jukka
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 29.07.1996
• Subjects: Applied sciences; Copolymerization; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Preparation, kinetics, thermodynamics, mechanism and catalysts; Ethylene derivative copolymer; Propylene copolymer; Ziegler Natta catalyst; Olefin copolymer; Property composition relationship; Temperature effect; Zirconium complex; Experimental study; Complex catalyst copolymerization; Metallocene; Functional polymer; Alcohol copolymer; Preparation; Ethylene copolymer; Chloro complex; Catalyst activity
• ISSN: 0024-9297; 1520-5835
• DOI: 10.1021/ma951607g

Ethylene and propylene were copolymerized with 10-undecen-1-ol, using stereorigid Et[Ind]2ZrCl2, Me2Si[Ind]2ZrCl2, Me2Si[2-MeInd]2ZrCl2, and Me2Si[2-Me-4,5-BenzoInd]2ZrCl2 catalysts activated with methylaluminoxane (MAO). As a reference, ethylene copolymerization was also carried out with the nonstereospecific catalyst [Ind]2ZrCl2/MAO. Characterization of the copolymers by 13C and 1H NMR spectroscopy revealed that the polymerization product was a true copolymer and that the conversion of the polar comonomer was strongly favored by the chiral geometry of the catalyst. The pretreatment of 10-undecen-1-ol with MAO before initiating the copolymerization increased the ethylene polymerization rate markedly and slightly improved the reactivity of the polar comonomer. A major improvement in the polymerization rate of 10-undecen-1-ol was obtained when the polymerization temperature and Al/Zr mole ratio were increased.