Influence of cyanate content on the morphology and properties of epoxy resins with phenolphthalein poly(ether ketone)

✍ Scribed by Junyan Li; Ping Chen; Qi Yu; Zemin Ma; Keming Ma; Baichen Wang

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 652 KB
• Volume: 121
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.33700

✦ Synopsis

Abstract

Phenolphthalein poly(ether ketone) (PEK‐C) was blended with the diglycidyl ether of bisphenol A epoxy resin and bisphenol A dicyanate ester. The effect of cyanate content on cure behaviors, thermal and mechanical properties of PEK‐C/epoxy/cyanate mixtures was investigated. As results, the increase of cyanate content slightly hindered the cure reaction of the mixtures. Fourier transform infrared results indicated that the curing reaction of the cured mixtures was complete. When the cyanate ester content increased, the flexural properties and T~g~ values were enhanced, and the initial thermal decomposition temperature was reduced. A significant improvement in fracture toughness was obtained when the cyanate group in the mixtures was excessive. The fracture toughness can be well explained by SEM observations. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011