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Frontal curing of epoxy resins: Comparison of mechanical and thermal properties to batch-cured materials

✍ Scribed by Yuri Chekanov; David Arrington; Greg Brust; John A. Pojman

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
220 KB
Volume
66
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

The epoxy resin diglycidyl ether of bisphenol F (DGEBF) was cured by the aliphatic amine curing agent Epicure 3371 in a stoichiometric ratio both frontally and in a batch-cure schedule. Glass transition temperatures ( T g ) were determined using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). DMA also was used for studying the storage modulus ( E) and tan delta (tan d) of the cured samples. Tensile properties of epoxy samples were tested according to ASTM D638M-93. The properties of the frontally cured epoxy resin were found to be very close to that of batch-cured epoxy resin. Velocity of cure-front propagation was measured for both neat and filled epoxy. Rubber particles (ground tires) were used as a filler. The maximum percentage of filler in the epoxy resin allowing propagation was 30%. Because of convection, only descending fronts would propagate. Advantages and disadvantages of frontal curing of epoxy resins are discussed.

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