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Dynamic mechanical properties of nonstoichiometric, amine‐cured epoxy resin
Author(s) -
Hirai T.,
Kline D. E.
Publication year - 1972
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.1972.070161209
Subject(s) - diethylenetriamine , epoxy , stoichiometry , materials science , amine gas treating , composite material , atmospheric temperature range , polymer chemistry , chemical engineering , chemistry , organic chemistry , thermodynamics , physics , engineering
The dynamic mechanical properties of epoxy resins cured with nonstoichiometric amounts [37%–103% of stoichiometric composition (SC)] of diethylenetriamine at room temperature have been measured in the temperature range 85° to 300°K and correlated to structures of cured resins. The dynamic mechanical behavior changed above and below 62.5% of SC, at which network structures are formed. The intensities of γ‐ and β‐peaks, ∼150° and ∼250°K, respectively, depend upon the concentration of DETA used. The processes of the γ‐ and β‐peaks are discussed.