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Packing density of the amine‐crosslinked stoichiometric epoxy networks
Author(s) -
Bellenger V.,
Dhaoui W.,
Morel E.,
Verdu J.
Publication year - 1988
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.1988.070350301
Subject(s) - materials science , sphere packing , stoichiometry , van der waals force , polymer , hydrogen bond , epoxy , atomic packing factor , polymer chemistry , polyamide , amine gas treating , composite material , molecule , chemistry , organic chemistry , crystallography
The packing densities (Van der Waals volume/molar volume) were determined at 293 K for various epoxide–amine stoichiometric networks. They are noticeably higher than those of linear polymers except strongly hydrogen bonded ones [polyamides, poly(vinyl alcohol)]. By extrapolation of the dilatometric data, it was found that the packing densities at the frontiers of the glassy state (0 K and T g ) of the epoxy networks are comparable to those of linear polymers having the same theoretical hydrogen bond density (polyamides). However, for a given packing density at 0 K, the packing density at T g is higher for a network than for the corresponding linear polymer.