The series of copolyesters were prepared from Chloro-Hydroquinone or Methyl-Hy-droquinone

Terephthalic acid and two kinds of comonomere

which could provide kinking and bending in chain: Oxy-4

4'-diphenol and Isophthalic acid. The four-components copolyesters in certain range of compositions have low melting temperature

steady mesophase in a broad temperature range and fiber-forming tendency. This report is focus on the relations of molecular composition-transitions-liquid crystallinity and fiber-forming tendency

and the morphologic features of mcsophase.