Abstract
AbstractSummary: The polypentenamer studied in this work, was a product obtained from bulk polymerization of gaseous cyclopentene into condensed polymer in presence of tungsten hexachloride alone as catalyst without any other reagent. This linear polymer doesn't present cross‐links or detectable secondary ramifications. However, its structural unit presents a double bond which can be in different configurations corresponding to cis and trans geometric isomers. The objective of this study was to determine the distribution type of these different structural units constituting the polymer chains. Fractions of cis and trans structural units in polymer chains were calculated from 13CNMR spectra. Statistical distribution of these structural units was observed on high resolution 13CNMR spectra, with the apparition of a quadruplet and a triplet corresponding respectively to the carbon on α and β position. The sextuplet corresponding to the carbon of the double bond was observed clearly in this work (may be because the product polymer is very pure), and confirms the statistical distribution. All peaks corresponding to the different positions of the α‐carbon, the β‐carbon and the olefinic carbon in polymer chains were attributed from statistical analysis of the polypentenamer microstructure.
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