Crystal-liquid crystal transition in single crystals of poly-hydroxybenzoic acid
- 1 June 1992
- journal article
- research article
- Published by Taylor & Francis in Journal of Macromolecular Science, Part B
- Vol. 31 (2), 163-173
- https://doi.org/10.1080/00222349208215510
Abstract
Electron diffraction patterns have been obtained from as-polymerized single crystals of phase II of poly-hydroxybenzoic acid as a function of temperature into the liquid-crystalline (lc) state above 350°C. The patterns in the lc state consist of two near hexagonal patterns rotated by 16°, with streaks connecting the high and low (orthorhombic) patterns over a transition temperature range of ca. 50°. Single crystal patterns have also been obtained from a number of other polymorphs at room temperature before and after heating to 400°C.Keywords
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