Determination of the chemical structure of poly-beta-pinene by NMR spectroscopy (Articolo in rivista)

Type
Label
  • Determination of the chemical structure of poly-beta-pinene by NMR spectroscopy (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1080/10601320802300735 (literal)
Alternative label
  • Franco Cataldo 1; Giancarlo Angelini 2; Donatella Capitani 2; Marco Gobbino 2; Ornella Ursini 2; Fabrizio Forlini 3. (2008)
    Determination of the chemical structure of poly-beta-pinene by NMR spectroscopy
    in Journal of macromolecular science. Part A. Pure & applied chemistry (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Franco Cataldo 1; Giancarlo Angelini 2; Donatella Capitani 2; Marco Gobbino 2; Ornella Ursini 2; Fabrizio Forlini 3. (literal)
Pagina inizio
  • 839 (literal)
Pagina fine
  • 849 (literal)
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  • 45 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 11 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 10 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Lupi Chemical Research, Via Casilina 1626/A, 00133 Rome, Italy and INAF- Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, Italy 2 Institute of Chemical Methodologies CNR Via Salaria Km. 29,300 00016 Monterotondo Stazione (Rome) Italy 3 ISMAC - CNR Via E. Bassini 15, 20133 Milano, Italy (literal)
Titolo
  • Determination of the chemical structure of poly-beta-pinene by NMR spectroscopy (literal)
Abstract
  • This paper is dedicated to the memory of our friend and colleague Annalaura Segre. The chemical structure of a series of beta(-)-pinene polymers (PBP) obtained by radiation-induced polymerization, free radical initiation, cationic polymerization over a Friedel-Craft catalyst and by coordinative polymerization over a Ziegler-Natta catalyst has been fully elucidated by (1)H and (13)C-NMR spectroscopy. 2D NMR techniques have been applied in order to assign all the NMR resonances to the structures of the PBP investigated. The NMR spectra show that the most regular PBP structure is obtained by radiation-induced polymerization followed by the free radical initiated polymerization. The most defective structure has been observed in the case of PBP prepared by cationic mechanism over a Friedel-Crafts catalyst. The discussion accounts for different types of defects and cross-links present in the PBPs investigated whose fundamental structure is based on the p-menthene repeating unit. NMR self-diffusion measurements have been performed to evaluate the molecular weight of all the PBP investigated. The highest molecular weight (2600 Dalton) was found in the case of PBP prepared by Ziegler-Natta catalyst, while the lowest molecular weight was found in the case of PBP prepared by radiation-induced polymerization (about 1000 Dalton). (literal)
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