Epoxy-silica polymers as restoration materials. Part 2. (Articolo in rivista)

Type
Label
  • Epoxy-silica polymers as restoration materials. Part 2. (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Cardiano P., Mineo P., Sergi S., Ponterio R.C., Triscari M., Piraino P. (2003)
    Epoxy-silica polymers as restoration materials. Part 2.
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cardiano P., Mineo P., Sergi S., Ponterio R.C., Triscari M., Piraino P. (literal)
Pagina inizio
  • 4435 (literal)
Pagina fine
  • 4441 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 44 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • Epoxy-silica polymers as restoration materials. Part 2. (literal)
Abstract
  • Room temperature reaction of the epoxy resin poly(bisphenolA-co-epichlorohydrin), glycidyl end-capped with the coupling agent (3- aminopropyl)triethoxysilane, in 1:2 (1), 1:1 (2) and 2:1 (3) molar ratios, leads, after curing for three months at room temperature, to glassy, transparent, crack-free solids which were investigated by SEM, TGA, DSC, NIR and Raman spectroscopy. SEM investigations show substantially a great homogeneity over the entire area with absence of cracks, veins and/or fissures and without formations of clusters and/or aggregates. The conversion of oxirane rings, as found by Raman spectroscopy, decreases by increasing the epoxy/amine ratio, with conversion percentages ranging from 95.3 to 81.3%. As a common feature, the presence in 1, 2 and 3 of Si–O–Si linkages increases the polymer degradation temperature and thermal oxidative stability relative to the parent epoxy resin by shifting the weight loss to higher temperatures. Differently from mixtures 2 and 3, which show the Tg at 90 8C, the mixture 1 does not exhibit any detectable glass transition. q 2003 Elsevier Science Ltd. All rights reserved. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
data.CNR.it