Characterization of epoxy thermosetting systems by differential scanning calorimetry | Zendy

Galy Jocelyne | Zendy; Sabra Abed | Zendy; Pascault JeanPieirre | Zendy

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Characterization of epoxy thermosetting systems by differential scanning calorimetry

Author(s) -

Galy Jocelyne,

Sabra Abed,

Pascault JeanPieirre

Publication year - 1986

Publication title -

polymer engineering and science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 111

eISSN - 1548-2634

pISSN - 0032-3888

DOI - 10.1002/pen.760262108

Subject(s) - epoxy , differential scanning calorimetry , thermosetting polymer , materials science , curing (chemistry) , diamine , enthalpy , glass transition , polymer chemistry , activation energy , standard enthalpy of reaction , catalysis , composite material , chemistry , organic chemistry , thermodynamics , polymer , physics

Differential Scanning Calorimetry (DSC) is used to study the curing behavior of epoxy systems. For non‐catalyzed diamine‐epoxy systems, the reaction enthalpy ΔH and the glass transition temperature T g are evaluated and related to the structure of the hardener. A method is developed to determine the activation energy. The effect of variations in the amine‐to‐epoxy ratio r on T g is also examined. A maximum value is observed for r = 1. Then, the influence of benzyldimethylamine as catalyst in an anhydride/DGEBA system and in three diamine/DGEBA systems is reported. In the cases of DDS and DDA curing agent the maximum value of T g is shifted, to r = 0, 6. The results are explained by different reaction mechanisms.

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