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Modeling and measurement of glass transition temperatures of energetic and inert systems
Author(s) -
Jaidann Mounir,
AbouRachid Hakima,
LafleurLambert Xavier,
Lussier LouisSimon,
Gag Nicole,
Brisson Josée
Publication year - 2008
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.21062
Subject(s) - glass transition , materials science , adipate , polybutadiene , differential scanning calorimetry , crystallinity , plasticizer , polymer , hydroxyl terminated polybutadiene , thermodynamics , work (physics) , molecule , inert , polymer chemistry , composite material , copolymer , organic chemistry , chemistry , physics
In this article, measurements of glass transition temperature ( T g ) changes of two energetic material blend systems were carried out using the differential scanning calorimetry (DSC) technique. On one hand, experimental T g values were compared to those predicted by the additivity model, Fox and Pochan equations, and, on other hand, to atomistic molecular dynamics simulation results performed in this work. The two blend systems studied were both composed of a polymer, either the inert hydroxyl‐terminated polybutadiene (HTPB) or the energetic polyglycidylazide (GAP), and smaller molecules, which acted as plasticizers, dioctyl adipate (DOA), or glycidylazide oligomers (Gp1). Modeling results show deviations from experimental data, which varied from 5 to 20 K over an absolute scale for pure components and blends. A good fit was found when predicting the effect of adding smaller molecules to HTPB. Simulations were particularly useful for the blend in which the glass transition temperature of one component, DOA, was not experimentally measurable, due to the high crystallinity of the small DOA molecule. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers.