Photo-oxidation products of polyetherimide ULTEM determined by MALDI-TOF-MS. Kinetics and mechanisms (Articolo in rivista)

Type

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

Label

• Photo-oxidation products of polyetherimide ULTEM determined by MALDI-TOF-MS. Kinetics and mechanisms (Articolo in rivista) (literal)

Anno

• 2003-01-01T00:00:00+01:00 (literal)

Alternative label

• S.Carroccio, C.Puglisi, G.Montaudo (2003)
  Photo-oxidation products of polyetherimide ULTEM determined by MALDI-TOF-MS. Kinetics and mechanisms
  in Polymer degradation and stability
  (literal)

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

• S.Carroccio, C.Puglisi, G.Montaudo (literal)

Pagina inizio

• 459 (literal)

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• 80 (literal)

Rivista

• Polymer degradation and stability (Rivista)

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• No. Citazione=9; Autocitazione=5; Motore utilizzato per le citazioni=Isiwebofknowledge.com (literal)

Note

• ISI Web of Science (WOS) (literal)

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• CNR, Universita' di Catania. (literal)

Titolo

• Photo-oxidation products of polyetherimide ULTEM determined by MALDI-TOF-MS. Kinetics and mechanisms (literal)

Abstract

• Poly 2,2-bis4-(3,4-dicarboxyphenoxy) phenylpropane dianhydride-1,3-phenylendiamine copolymer (ULTEM) was subjected to photo aging in the attempt to find evidence on the structure of the species formed in the oxidative degradation. The oxidation was followed as a function of the exposure time by MALDI and SEC/MALDI techniques. The SEC curves showed extensive degradation, with the formation of low molar mass oligomers having different end groups. Valuable structural information on the photo-oxidized ULTEM species was extracted from the MALDI spectra of the photo-oxidized ULTEM. These showed the presence of polymer chains containing acetophenone, phenyl acetic acid, phenols, benzoic acid, phthalic anhydride and phthalic acid end groups. The mechanisms accounting for the formation of photo-oxidation products involve several simultaneous reactions: (1) photo-cleavage of methyl groups of the N-methyl phthalimide terminal units; (2) photoxidative degradation of the isopropylidene bridge of BPA units; (3) photo-oxidation of phthalimide units to phthalic anhydride end groups: (4) hydrolysis of phthalic anhydride end groups. The kinetic behaviour of all the species detected is in agreement with the predictions of the reaction mechanisms hypothesized (literal)

Prodotto di

• Institute of chemistry and technology of polymers (ICTP) (Istituto)

Autore CNR

• CONCETTO PUGLISI (Persona)
• SABRINA CAROLA CARROCCIO (Persona)

Incoming links:

Autore CNR di

• SABRINA CAROLA CARROCCIO (Persona)
• CONCETTO PUGLISI (Persona)

Prodotto

• Institute of chemistry and technology of polymers (ICTP) (Istituto)

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• Polymer degradation and stability (Rivista)