Inclusion polymerization of isoprene in deoxycholic acid (Articolo in rivista)

Type
Label
  • Inclusion polymerization of isoprene in deoxycholic acid (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.radphyschem.2009.01.008 (literal)
Alternative label
  • F. Cataldo (a,b); P. Ragni (c); A. Rosati (c); O. Ursini (c) (2009)
    Inclusion polymerization of isoprene in deoxycholic acid
    in Radiation physics and chemistry (1993)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • F. Cataldo (a,b); P. Ragni (c); A. Rosati (c); O. Ursini (c) (literal)
Pagina inizio
  • 338 (literal)
Pagina fine
  • 344 (literal)
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  • 78 (literal)
Rivista
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  • 7 (literal)
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  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a) Lupi Chemical Research, Via Casilina 1626/A, 00133 Rome, Italy b) Istituto Nazionale di Astrofisica - Osservatorio di Astrofisica di Catania, Via S. Sofia 78, 95123 Catania, Italy c) Institute of Chemical Methodologies, CNR, Via Salaria Km. 29,300, 00016 Monterotondo Stazione, Rome, Italy (literal)
Titolo
  • Inclusion polymerization of isoprene in deoxycholic acid (literal)
Abstract
  • The radiation-induced polymerization of isoprene was made on its inclusion (or clathrate) complex with deoxycholic acid (DOCA) at 150 and 300kGy. The microstructure of the resulting polyisoprene (PIP) was studied by FTIR spectroscopy and found fully comparable to that of PIP prepared by emulsion polymerization by a free radical initiator. Thus, the 1,4-trans content was found to be 48% and that of 1,4-cis units was 28% of the polymer structure: the remaining are being 1,2 and 3,4 units. The PIP irregular microstructure was justified in terms of monomer dynamics inside the DOCA channels. PIP from inclusion polymerization is fully amorphous as studied by differential thermal analysis (DTA) in comparison to an authentic sample of trans-1,4-polyisoprene, which instead has a crystalline melting point of 71.5 degrees C. The inclusion complex of PIP with DOCA (PIP@DOCA) shows a DTA melting point of 194.4 degrees C, 12.4 degrees C higher than the melting point of pure DOCA. PIP isolated from inclusion polymerization from DOCA and its complex PIP@DOCA was studied also by thermogravimetry (TGA) and differential thermogravimetry (DTG). (literal)
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