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Effect of aromatic substitution on the kinetics and properties of epoxy cured tri‐phenylether amines
Author(s) -
Varley Russell J.,
Dao Buu,
Tucker Sam,
Christensen Steve,
Wiggins Jeffrey,
Dingemans Theo,
Vogel Wouter,
Marchetti Martino,
Madzarevic Zeljka
Publication year - 2019
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.47383
Subject(s) - thermogravimetric analysis , diglycidyl ether , reactivity (psychology) , ether , kinetics , polymer chemistry , materials science , bisphenol a , dynamic mechanical analysis , epoxy , diphenyl ether , phenylene , chemistry , organic chemistry , composite material , polymer , medicine , alternative medicine , physics , pathology , quantum mechanics
The reaction kinetics and structure property relationships of isomeric tri‐aromatic ether‐linked amines based on the structure bis (aminophenoxy) benzene, cured with diglycidyl ether of bisphenol F (BisF) are investigated in this study. Reaction kinetics are explored using rheological and calorimetric measurements, whereas structure property relationships are determined from their flexural properties, dynamic mechanical properties (DMTA), and thermogravimetric analysis (TGA). A BisF network cured with 4,4 diamino diphenyl sulphone (44 DDS) is used as a benchmark to represent a commercially available high‐performance resin system. Varying the substitution of the ether linkages on the aromatic groups from ortho, meta to para was found to have a significant impact on reactivity and network properties after cure. The variations are explained in terms of inductive and resonance effects primarily acting on the outer aromatic rings. Interestingly, however, these same effects acting on the central aromatic ring also impact upon reactivity despite their proximity from the amines. Mechanical and thermal properties are explained by changes in the short‐range molecular mobility within the network architecture such as phenylene rotations or π flips and are experimentally validated from the breadth and position of the subambient γ relaxations. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47383.