Tractable High Performance Polymers
Final technical rept. 1 Sep 1988-31 Aug 1990,
CALIFORNIA UNIV SANTA BARBARA DEPT OF MATERIALS
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The program of Tractable High Performance Polymers was an interdisciplinary research effort to develop the science and technology of synthesis, molecular characterization, processing and solid state characterization of novel tractable high performance rod-like polymers through different concepts of side group modification. Theoretical models for the mechanical behavior of oriented crystalline polymers and high-modulus polymers were developed. The influence of flexible alkyl side chains of rod-like polymers on the mechanical properties of highly oriented structures was theoretically analyzed and experimentally verified with polyhexl isocyanate. The role of hydrogen bonding in controlling the tensile deformation was investigated by solid state NMR. A variety of tractable para-linked aromatic LC polyesters, which were amorphous, were synthesized and fully characterized by several techniques. The tractability was achieved by the incorporation of novel arylsubstituents and non-coplanar monomers into the chemical structure. These materials were processed from the liquid crystalline phase and then mechanically deformed through tensile processes.
- Polymer Chemistry