Journal of Chemical Sciences

, Volume 129, Issue 9, pp 1461–1468 | Cite as

Thermotropic liquid crystalline polyesters derived from 2-chloro hydroquinone

  • Nagesh Manurkar
  • Sayaji More
  • Khudbudin Mulani
  • Nitin Ganjave
  • Nayaku Chavan
Regular Article
  • 106 Downloads

Abstract

Synthesis of thermotropic liquid crystalline polyesters derived from bis[4-hydroxy benzoyloxy]-2-chloro-1,4-benzene (BHBOCB) and aliphatic dicarboxylic acid chlorides by interfacial polycondensation methodology is presented. Synthesised polyesters consist of bis[4-hydroxy benzoyloxy]-2-chloro-1,4-benzene as a mesogen and aliphatic diacid chloride as flexible spacer. The length of oligomethylene units in the polymer was varied from the trimethylene to the dodecamethylene groups. Synthesized polyesters were characterized by differential scanning calorimetry and optical microscopy. The transition temperatures and thermodynamic properties were studied for all these polymers. These polyesters exhibited thermotropic liquid crystalline behavior and showed nematic texture except decamethylene spacer. Decamethylene spacer based polyester showed marble texture of smectic C. Mesophase stability of these polyesters was higher than \(123{^{\circ }}\hbox {C}\) (except first heating cycle of PE-1).

Graphical Abstract:

SYNOPSIS The present study deals with the synthesis of thermotropic liquid crystalline polyesters derived from bis[4-hydroxy benzoyloxy]-2-chloro-1,4-benzene (BHBOCB) and aliphatic dicarboxylic acid chlorides by interfacial polycondensation methodology.

Keywords

Thermotropic liquid crystalline polyesters aromatic mesogen aliphatic flexible spacers 

Notes

Supplementary material

12039_2017_1342_MOESM1_ESM.doc (4.1 mb)
Supplementary material 1 (doc 4206 KB)

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Copyright information

© Indian Academy of Sciences 2017

Authors and Affiliations

  • Nagesh Manurkar
    • 1
  • Sayaji More
    • 1
  • Khudbudin Mulani
    • 1
  • Nitin Ganjave
    • 1
  • Nayaku Chavan
    • 1
  1. 1.Polymer Science and Engineering DivisionCSIR-National Chemical LaboratoryPuneIndia

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