Elliot Douglas - One of our major
activities is investigation of the structure-property relationships
in liquid crystalline thermosets (LCT's). LCT's are low molar mass liquid
crystals with crosslinking endgroups attached. The general structure
of such a thermoset can be represented as:
We may also add a hardener, a separate molecule
that participates in the cure reaction. By varying the structure of
the various pieces of the molecule, we can understand how to control
the liquid crystallinity and the resulting properties of the material.
For example, we have found that the cure reaction itself can affect
the liquid crystallinity. This effect can be described by a non-equilibrium
transformation diagram.
For example, curing along the path from A to
B results in transformation of the material from an isotropic to a liquid
crystalline fluid. We are currently working to understand the details
of these transformation diagrams.