02767nas a2200277 4500008004100000245008200041210006900123260000800192490000800200520188500208653000902093653004202102653002102144653001402165653001502179653001502194653001302209653004702222653001002269100002102279700001702300700002202317700001902339700001902358856011202377 2017 eng d00aThermotropic liquid crystalline polyesters derived from 2-chloro hydroquinone0 aThermotropic liquid crystalline polyesters derived from 2chloro  cSEP0 v1293 a

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 (except first heating cycle of PE-1). 

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.

10aacid10aAliphatic Flexible Spacers Main-chain10aAromatic Mesogen10aElastomer10aMorphology10aPolydomain10aPolymers10aThermotropic Liquid Crystalline Polyesters10aUnits1 aManurkar, Nagesh1 aMore, Sayaji1 aMulani, Khudbudin1 aGanjave, Nitin1 aChavan, Nayaku uhttps://library.ncl.res.in/content/thermotropic-liquid-crystalline-polyesters-derived-2-chloro-hydroquinone