The hydrothermal ageing of epoxy-thermoplastic blends, used as matrices for carbon fibre composites, cured by electron beam, has been studied. Two different thermoplastic percentages have been adopted. A suitable choice of both curing process and formulation parameters allows to carry out irradiation at mild temperature with several advantages, coming from a "non thermal" process, for both the final properties of the materials and the environment. Nevertheless the occurring of vitrification phenomena needs the use of a short thermal treatment after irradiation on the already solid materials, in order to complete the cure reactions. Radiation cured epoxy based matrices have been subjected to a thermal and moisture absorption ageing treatment and its influence on the thermal and mechanical properties has been investigated through dynamic mechanical thermal analysis and fracture toughness tests. The results have been interpreted on the basis of the different curing degree reached by the investigated systems and in the light of their morphological structures. Plasticization, thermal curing and degradation reactions occur in different extent depending on the kind of the material. In particular, for fracture properties, a better resistance to ageing is shown by the system at higher thermoplastic concentration.

Alessi, S., Conduruta, D.G., Pitarresi, G., Dispenza, C., Spadaro, G. (2010). Hydrothermal ageing of radiation cured epoxy resin-polyether sulfone blends as matrices for structural composites. POLYMER DEGRADATION AND STABILITY, 95, 677-683 [10.1016/j.polymdegradstab.2009.11.038].

Hydrothermal ageing of radiation cured epoxy resin-polyether sulfone blends as matrices for structural composites

ALESSI, Sabina;PITARRESI, Giuseppe;DISPENZA, Clelia;SPADARO, Giuseppe
2010-01-01

Abstract

The hydrothermal ageing of epoxy-thermoplastic blends, used as matrices for carbon fibre composites, cured by electron beam, has been studied. Two different thermoplastic percentages have been adopted. A suitable choice of both curing process and formulation parameters allows to carry out irradiation at mild temperature with several advantages, coming from a "non thermal" process, for both the final properties of the materials and the environment. Nevertheless the occurring of vitrification phenomena needs the use of a short thermal treatment after irradiation on the already solid materials, in order to complete the cure reactions. Radiation cured epoxy based matrices have been subjected to a thermal and moisture absorption ageing treatment and its influence on the thermal and mechanical properties has been investigated through dynamic mechanical thermal analysis and fracture toughness tests. The results have been interpreted on the basis of the different curing degree reached by the investigated systems and in the light of their morphological structures. Plasticization, thermal curing and degradation reactions occur in different extent depending on the kind of the material. In particular, for fracture properties, a better resistance to ageing is shown by the system at higher thermoplastic concentration.
2010
Alessi, S., Conduruta, D.G., Pitarresi, G., Dispenza, C., Spadaro, G. (2010). Hydrothermal ageing of radiation cured epoxy resin-polyether sulfone blends as matrices for structural composites. POLYMER DEGRADATION AND STABILITY, 95, 677-683 [10.1016/j.polymdegradstab.2009.11.038].
File in questo prodotto:
File Dimensione Formato  
PDS 2010.pdf

Solo gestori archvio

Dimensione 963.43 kB
Formato Adobe PDF
963.43 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/53802
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 43
  • ???jsp.display-item.citation.isi??? 39
social impact