Metallocene‐mediated cationic ring‐opening polymerization of 2‐methyl‐ and 2‐phenyl‐oxazoline |
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Authors: | Maria‐Evgenia Kourti Georgios C Vougioukalakis Nikos Hadjichristidis Marinos Pitsikalis |
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Institution: | Department of Chemistry, University of Athens, Panepistimiopolis Zographou 15771, Athens, Greece |
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Abstract: | The cationic ring‐opening polymerization of 2‐methyl‐2‐oxazoline and 2‐phenyl‐2‐oxazoline was efficiently used using bis(η5‐cyclopentadienyl)dimethyl zirconium, Cp2ZrMe2, or bis(η5‐tert‐butyl‐cyclopentadienyl)dimethyl hafnium in combination with either tris(pentafluorophenyl)borate or tetrakis(pentafluorophenyl)borate dimethylanilinum salt as initiation systems. The evolution of polymer yield, molecular weight, and molecular weight distribution with time was examined. In addition, the influence of the initiation system and the monomer on the control of the polymerization was studied. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 000: 000–000, 2011 |
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Keywords: | cationic polymerization hafnium kinetics metallocene catalysts polyoxazolines zirconium |
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