Professor James Economy's Group
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[Polymer Blends] [Microelectronic Polymers]
[Liquid Crystalline
Polyesters] [Polyester Thermosetting Resins] Polyester
Thermosetting Resins High
Performance Polyesters These
materials generally don't fall into the
"low-cost" region, however, since they are
related to this family of materials I'll mention them
here. These materials are high-performance matrix and
adhesive materials. In general these materails have been
able to reach lap-shear strengths up to 20 MPa, they have
a use temperature up to around 400 degrees C, with
relatively low change in strengths. These materials
exhibit interchain transesterification reactions (ITR),
and have been shown to be recyclable. Medium
Performance, Medium Cost Polyesters Using very common
precursors and simple chemistry, we have been able to
produce polyester resins which can be processed between
230 and 250 degrees C, exhibit almost as good lap-shear
properties as the High Performance polyesters above,
however, exhibit a lower use temperature (up to 180
degrees C.) These materials and the Low-Cost materials
will hopefully fill a temperature void (above 150 degrees
C) which occurs due to lack of low-cost thermosets (other
than Phenol Formaldehyde) in industry. These materials
again can be recycled and exhibit ITR reactions as due
the following and previous materials mentioned. Medium
Performance, Low-Cost Polyesters The precursors and synthesis of these
materials point to costs in the range of 60 cents / lb.
(This is lower than Phenol Formaldehyde's current costs).
The materials used to make these polyesters are in
wide-spread use, but have never been researched for
engineering properties before. Since we are in the
synthesis stage of this material, no properties can be
discussed yet. Things look promising though. These
materials also exhibit ITR reactions, and should be able
to be recycled as mentioned earlier.
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