Thermo-optic observations on a main-chain thermotropic liquid-crystal polymer
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The morphological transitions of a main-chain liquid crystalline chromophoric polymer in which all of the electric dipole moments were arranged head-to-tail were investigated using the techniques of small-angle light scattering, x-ray scattering, differential scanning calorimetry and polarised optical microscopy. Above 96°C the material developed a birefringent nematic texture followed, at temperatures higher than 141°C, by a monotropic structure which was retained until the onset of thermal degradation. Under certain heating/cooling regimes non-centrosymmetric solid polymer films with low scattering characteristics could be prepared.
|Number of pages||7|
|Publication status||Published - 1 May 1993|