Premium
Molecular mobility in polycyanurate networks investigated by viscoelastic measurements and molecular simulations
Author(s) -
Georjon Olivier,
Schwach Gregoire,
Gerard JeanFrançois,
Galy Jocelyne,
Albrand Michel,
Dolmazon Rene
Publication year - 1997
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.11809
Subject(s) - materials science , viscoelasticity , molecular dynamics , arrhenius equation , series (stratigraphy) , molecule , cyanate ester , ring (chemistry) , chemical physics , computational chemistry , chemistry , composite material , activation energy , physics , organic chemistry , quantum mechanics , paleontology , epoxy , biology
The dynamic mechanical behavior of a series of polycyanurate networks has been studied in the glassy state as a function of cyanate conversion. Two relaxations, β and γ, were defined and the Arrhenius dependence and Starkweather treatments were applied. To understand the origin of these sub‐ T g relaxations, molecular modeling (both mechanics and dynamics) was used on model molecules representative of the network structure. Two types of molecular motion were examined: rotation of the phenylene ring and crankshaft of the chain segment between crosslinks (i.e., triazine rings).