A Polyimide Nanocomposite from
Octa(aminophenyl)silsesquioxane
Ryo Tamaki
Jiwon Choi
Richard M. Laine
10.1021/cm020797o.s001
https://acs.figshare.com/articles/journal_contribution/A_Polyimide_Nanocomposite_from_Octa_aminophenyl_silsesquioxane/3593709
Octaaminophenylsilsesquioxane (OAPS) can serve as a nanosized building block for the
construction of materials with nanometer control of the periodicity of the organic and
inorganic components and bonding between components. We describe here the synthesis of
a prototypical three-dimensional polyimide by reaction of OAPS with pyromellitic dianhydride
(PMDA). Model studies with phthalic anhydride provided useful cure conditions. Thus,
stoichiometrically correct OAPS/PMDA nanocomposites were obtained following curing of
NMP and DMF reaction solutions at lower temperatures and then to >350 °C/N<sub>2</sub> under
vacuum. The resulting materials offer thermal stabilities in air and N<sub>2</sub> of >500 °C (5% mass
loss temperature) and char yields >75%/N<sub>2</sub>. X-ray powder patterns indicate that the resulting
materials are completely amorphous, as might be expected from the extreme rigidity of the
organic tethers linking cube vertexes that will prevent long-range ordering from occurring
during curing. These materials hold promise for high compressive strength applications.
2003-01-17 00:00:00
materials offer
cure conditions
Polyimide Nanocomposite
cube vertexes
phthalic anhydride
N 2
nanometer control
nanosized building block
Model studies
component
PMDA
strength applications
NMP
OAPS
pyromellitic dianhydride
DMF reaction solutions