Ozonization of atactic and tactic polymers having vinyl, methylvnyl and dimethylvinyl pendant groups (Articolo in rivista)

Type
Label
  • Ozonization of atactic and tactic polymers having vinyl, methylvnyl and dimethylvinyl pendant groups (Articolo in rivista) (literal)
Anno
  • 2000-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/S0141-3910(99)00140-8 (literal)
Alternative label
  • Cataldo, F.; Ricci, G.; Crescenzi, V. (2000)
    Ozonization of atactic and tactic polymers having vinyl, methylvnyl and dimethylvinyl pendant groups
    in Polymer degradation and stability; ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cataldo, F.; Ricci, G.; Crescenzi, V. (literal)
Pagina inizio
  • 421 (literal)
Pagina fine
  • 426 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 67 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Università di Roma La sapienza; CNR-ISMAC Istituto per lo Studio delle Macromolecole. (literal)
Titolo
  • Ozonization of atactic and tactic polymers having vinyl, methylvnyl and dimethylvinyl pendant groups (literal)
Abstract
  • Atactic and syndiotactic 1,2-polybutadiene, atactic 3,4-polyisoprene and poly(4-methyl-1,3-pentadiene)1,2 syndiotactic, having respectively vinyl, methylvinyl and dimethylvinyl pendant groups have been ozonized. The reaction products and the reaction speed toward ozone attack in solution have been studied by FT-IR spectroscopy. The tacticity seems to have no influence on either the reaction products or the reaction speed with ozone. The main product formed by ozonization of syndiotactic 1,2-polybutadiene and of poly(4-methyl-1,3-pentadiene)1,2 syndiotactic is a poly(acrolein) or poly(propenal). Thus each vinyl or dimethylvinyl monomer unit can be mainly converted into an aldehyde pendant group. In the case of atactic 3,4-polyisoprene, ozonization allows changing the methylvinyl group into a methylketone pendant group. Ozonization of atactic 3,4-polyisoprene and also poly(4-methyl-1,3-pentadiene)1,2 syndiotactic, introduces some epoxy groups into the vinyl double bonds as a secondary reaction. The reaction speed with ozone was found to be faster with the most alkyl-substituted double bond in agreement with a general rule. Thus the reaction speed is from the fastest to the slowest as follows, [poly(4-methyl-1,3-pentadiene)1,2 syndiotactic] > [3,4-polyisoprene] > [1,2-polybutadiene]. Ozonization of vinyl polymers could be a way for introducing oxygenated functional groups which can then be used as sites for crosslinking these polymers to prepare new polymer networks. (literal)
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