Structure-property evaluation of trisilanolphenyl POSS®/polysulfone composites as a guide to POSS melt blending
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Document typeArticle
Defense date2012-08-15
Rights accessRestricted access - publisher's policy
Abstract
A series of polysulfone/phenyl trisilanol
POSS nanocomposites were produced by melt blending by
twin screw batch mixing. These materials were then injec-
tion molded, and their thermal, mechanical, and morpho-
logical properties were tested. The tensile properties of
polysulfone were moderately compromised by the addition
of phenyl TPOSS, because of the formation of large (
1
l
m)
voided POSS aggregates. These domains however did cause
the improvement of the impact resistance of the composites
as described by the mechanism of crack pinning and bow-
ing. Flexural properties remained essentially unchanged,
which is attributed to the formation of an aggregate free-
skin layer, which formed in the injection molded parts. Thermal behavior of the composites also remained largely
unchanged due to the lack of POSS-polymer interactions
on the molecular/chain segment scale. Initially, it was
hypothesized that a high degree of POSS-polymer interac-
tions would be present in these composited based on exami-
nation of their chemical structures. This however, was not
the case as phase separation was clearly present. This work
highlights the need for a better understanding of the predic-
tion of POSS-polymer interaction.
CitationMilliman, H. [et al.]. Structure-property evaluation of trisilanolphenyl POSS®/polysulfone composites as a guide to POSS melt blending. "Journal of applied polymer science", 15 Agost 2012, vol. 125, núm. 4, p. 2914-2919.
ISSN0021-8995
Publisher versionhttp://onlinelibrary.wiley.com/doi/10.1002/app.36229/pdf
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