Cure Kinetics and Processing Parameters of Neat and Reinforced High Performance Epoxy Resins: Evaluation of Techniques

Kinetic equation parameters for the curing reaction of a commercial glass fiber reinforced high performance epoxy prepreg composed of the tetrafunctional epoxy tetraglycidyl 4,4-diaminodiphenyl methane (TGDDM), the tetrafunctional amine curing agent 4,4-diaminodiphenylsulfone (DDS) and an ionic initiator/accelerator, are determined by various thermal analysis techniques and the results compared. The reaction is monitored by heat generated determined by differential scanning calorimetry (DSC). The changes in physical properties indicating increasing conversion are followed by shifts in glass transition temperature determined by DSC and temperature-modulated DSC (TMDSC), thermomechanical (TMA) and dynamic mechanical (DMA) analysis and thermally stimulated depolarization (TSD). Changes in viscosity, also indicative of degree of conversion, are monitored by DMA. Thermal stability as a function of degree of cure is monitored by thermogravimetric analysis (TGA). The parameters of the general kinetic equations, including activation energy and rate constant, are explained and used to compare results of various techniques. The utilities of the kinetic descriptions are demonstrated in the construction of a useful time-temperature-transformation (TTT) diagram for rapid determination of processing parameters in the processing of prepregs.

Grantor dc:publisher

University of North Texas

Year dc:date

1999

Author dc:creator

• Bilyeu, Bryan

Contributors dc:contributor

• Brostow, Witold, 1934-
• Menard, Kevin P.
• Reidy, Richard
• D'Souza, Nandika A.
• Gnade, Bruce

• Epoxy resins -- Curing.
• ionic initiator/accelerator
• DMA
• prepregs
• curing reactions

Statement dc:rights

• Use restricted to UNT Community
• Copyright
• Bilyeu, Bryan
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 47127255
untcat: b2299275
https://digital.library.unt.edu/ark:/67531/metadc2281/
ark: ark:/67531/metadc2281

OAI identifier oai:identifier

info:ark/67531/metadc2281