Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and Properties of Thermotropic Compounds with Two Terminal Mesogenic Units and a Central Spacer (Ⅱ). Homologous Series of $\alpha,\;\omega$-Bis (4-p-substituted phenoxycarbonyl)phenoxyalkanes

  • Jin, Jung-Il (Department of Chemistry, Korea University) ;
  • Chung, Yong-Seog (Department of Chemistry, Korea University) ;
  • Lenz, R.W. (Department of Chemical Engineering, Materials Research Laboratory, University of Massachusetts.) ;
  • Ober, C. (Department of Chemical Engineering, Materials Research Laboratory, University of Massachusetts.)
  • Published : 1983.06.20
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Abstract

Two series of thermotropic compounds were prepared and their thermal and liquid crystal properties were examined by differential scanning calorimetry and on the hot-stage of a cross-polarizing microscope. The first series of the compounds has two terminal mesogenic units based on unsubstituted and substituted p-(phenoxycarbonyl) phenyl ethers bracketing a central decamethylene spacer, and the second has 4-(p-phenylphenoxycarbonyl) phenyl ether moiety as the two terminal mesogenic units and central polymethylene spacers of varying lengths. A thermodynamic analysis of the phase transitions was made and explained in relation to structures and thermotropic behavior of the compounds.

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References

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  11. presented at the 65th Canadian Chemical Conference Thermotropic Polyesters Based on p-Hydroxybenzoic Acid C. Ober;R. W. Lenz;J-I. Jin;E. Chiellini
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  15. IUPAC 18th Macromolecular Symposium Proceedings H. Yu

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