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Kinetic Studies of Metallocene‐Catalyzed Copolymerization of Propene with 10‐Undecene‐1‐ol Using In‐Line FTIR Spectroscopy
Author(s) -
Sahre Karin,
Schulze Ulrich,
Eichhorn KlausJ.,
Voit Brigitte
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700145
Subject(s) - comonomer , propene , copolymer , metallocene , reaction rate constant , polymer chemistry , fourier transform infrared spectroscopy , chemistry , polymerization , infrared spectroscopy , catalysis , analytical chemistry (journal) , kinetics , organic chemistry , chemical engineering , physics , polymer , quantum mechanics , engineering
The present study describes the quantitative monitoring of the metallocene‐catalyzed copolymerization of propene with 10‐undecene‐1‐ol (UO) by in‐line ATR‐FTIR spectroscopy in order to obtain kinetic data. For the description of the time dependency of this copolymerization reaction a pseudo‐first‐order rate law was used. The apparent rate constant k app of the comonomer consumption could be determined by evaluation of the integral absorbances of characteristic IR bands of the double bond of UO and of special IR determined concentration profiles of that comonomer using chemometric tools. The apparent rate constants determined by the integral absorbances of the ν CC band (stretching vibrations) range of 0.32–0.66 × 10 −4 s −1 whereas evaluation of the absolute concentrations of the comonomer yields rate constants of 0.29–0.57 × 10 −4 s −1 . Variations within the rate constants obtained from different experimental runs point to a certain complexity of the reaction and a significant dependence of the copolymerization on the exact polymerization procedure.