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Effect of PEGDE addition on rheological and mechanical properties of bisphenol E cyanate ester
Author(s) -
Sheng Xia,
Hanus Riley,
Bauer Amy,
Kessler Michael R.
Publication year - 2013
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39118
Subject(s) - cyanate ester , materials science , diglycidyl ether , cyanate , rheology , glass transition , toughness , curing (chemistry) , epoxy , bisphenol a , composite material , thermosetting polymer , dynamic mechanical analysis , prepolymer , activation energy , izod impact strength test , toughening , charpy impact test , polymer chemistry , polymer , ultimate tensile strength , chemistry , organic chemistry , polyurethane
Cyanate esters are a group of resins with exceptional thermal and mechanical properties and are often blended with lower cost epoxy resins. These blends are often brittle, and a toughening method, such as the addition of soft segments, is necessary. Poly(ethylene glycol) diglycidyl ether, or PEGDE, was added to bisphenol E cyanate ester as a toughening agent. PEGDE was added at loadings of 0–30 wt %, and rheological and mechanical properties were analyzed after curing. As PEGDE loading was increased, the gel point increased accordingly while the activation energy of gelation decreased, indicating PEGDE accelerated the gelation process. Dynamic mechanical analysis results indicated a decrease in glass transition temperature as the PEGDE loading increased. Three‐point bending tests yielded similar toughness to the neat BECy at low PEGDE loadings, with a dramatic increase at loadings of 25 and 30 wt % PEGDE. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013