Effect of the segmental mobility restriction on the thermoset chemical kinetics (Articolo in rivista)

Type

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

Label

• Effect of the segmental mobility restriction on the thermoset chemical kinetics (Articolo in rivista) (literal)

Anno

• 2002-01-01T00:00:00+01:00 (literal)

Alternative label

• Antonucci V. , Giordano M., , Nicolais L. (2002)
  Effect of the segmental mobility restriction on the thermoset chemical kinetics
  
  (literal)

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

• Antonucci V. , Giordano M., , Nicolais L. (literal)

Pagina inizio

• 3757 (literal)

Pagina fine

• 3770 (literal)

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

• 40 (literal)

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

• The paper introduces a model to describe the isothermal cure of an epoxy resin at temperature levels for which the rate of the process is controlled by both the concentration of the reacting species and reactive segment mobility. Model predicts correctly both the devitrification-vitrification-devitrification sequence occurring during the thermoset reaction under constant heating rate scans and the shape change of the overall rate which has been experimentally observed during very low heating rate tests. (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• IMCB CNR (literal)

Titolo

• Effect of the segmental mobility restriction on the thermoset chemical kinetics (literal)

Abstract

• Cure kinetic of an epoxy-amine commercial thermoset system has been investigated by the isothermal differential scanning calorimetric technique. In particular, the kinetic study has been performed in the glassy transition zone where diffusion phenomena become competing with the chemical transformations and the overall reaction rate is partially slowed down by the reduced segmental chain mobility. A generalized form of the Vogel equation has been formulated to account for the effect of the glassy transition temperature increasing on the chain mobility and, hence, on the overall reaction rate. The kinetic model has been expressed by means of two factors representing the chemical reaction rate and the segmental mobility reduction respectively. As main result, the activation energy Es relative to the diffusion phenomena has been found very low showing the value of 42.5 K„l0.356 kJ/mol, which is compatible only with small-angle rotation of the reactive unit. (literal)

Prodotto di

• Institute for composite and biomedical materials (IMCB) (Istituto)

Autore CNR

• VINCENZA ANTONUCCI (Unità di personale interno)
• MICHELE GIORDANO (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Effect of the segmental mobility restriction on the thermoset chemical kinetics" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• MICHELE GIORDANO (Unità di personale interno)
• VINCENZA ANTONUCCI (Unità di personale interno)

Prodotto

• Institute for composite and biomedical materials (IMCB) (Istituto)

Insieme di parole chiave di

• Keywords of "Effect of the segmental mobility restriction on the thermoset chemical kinetics" (Insieme di parole chiave)