Evidence for ester-exchange reactions and cyclic oligomer formation in the ring-opening polymerization of lactide with aluminum complex initiators (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Evidence for ester-exchange reactions and cyclic oligomer formation in the ring-opening polymerization of lactide with aluminum complex initiators (Articolo in rivista) (literal)

Anno

• 1996-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1021/ma960538i (literal)

Alternative label

• Giorgio Montaudo; Maurizio S. Montaudo, Concetto Puglisi, and Filippo Samperi; N. Spassky, Alain LeBorgne, and Muriel Wisniewski (1996)
  Evidence for ester-exchange reactions and cyclic oligomer formation in the ring-opening polymerization of lactide with aluminum complex initiators
  in Macromolecules (Online)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Giorgio Montaudo; Maurizio S. Montaudo, Concetto Puglisi, and Filippo Samperi; N. Spassky, Alain LeBorgne, and Muriel Wisniewski (literal)

Pagina inizio

• 6461 (literal)

Pagina fine

• 6465 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 29 (literal)

Rivista

• Macromolecules (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 5 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 20 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Universita' di Catania; CNR; Universite' Pierre et Marie Curie, France (literal)

Titolo

• Evidence for ester-exchange reactions and cyclic oligomer formation in the ring-opening polymerization of lactide with aluminum complex initiators (literal)

Abstract

• Four polylactide samples, obtained by ring-opening polymerization with an aluminum alkoxide initiator derived from a Schiff's base, were characterized by MALDI-TOF mass spectrometry. The MALDI mass spectra of these polylactides show well-resolved signals that can be reliably assigned to polylactide oligomers. Remarkably, both even-membered and odd-membered oligomers are present in these MALDI spectra. The presence of odd-membered oligomers cannot be explained on the basis of the lactide ring-opening polymerization, and one must admit that ester-exchange reactions do occur parallel to the polymerization process, causing a random cleavage of the polylactide chain. Furthermore, evidence for the presence of cyclic lactides was found in the MALDI-TOF spectrum of a low molecular weight polylactide fraction, indicating that ester exchange occurs also in polylactides by intramolecular endbiting reactions (ring-chain equilibration), with formation of cyclic oligomers. (literal)

Prodotto di

• Istituto di chimica e tecnologia dei polimeri (ICTP) (Istituto)

Autore CNR

• MAURIZIO MONTAUDO (Unità di personale interno)
• CONCETTO PUGLISI (Unità di personale interno)
• FILIPPO SAMPERI (Persona)

Insieme di parole chiave

• Parole chiave di "Evidence for ester-exchange reactions and cyclic oligomer formation in the ring-opening polymerization of lactide with aluminum complex initiators" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• FILIPPO SAMPERI (Persona)
• CONCETTO PUGLISI (Unità di personale interno)
• MAURIZIO MONTAUDO (Unità di personale interno)

Prodotto

• Istituto di chimica e tecnologia dei polimeri (ICTP) (Istituto)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Macromolecules (Rivista)

Insieme di parole chiave di

• Parole chiave di "Evidence for ester-exchange reactions and cyclic oligomer formation in the ring-opening polymerization of lactide with aluminum complex initiators" (Insieme di parole chiave)