Higashi, F., Yamada, Y. and Hoshio, A. (1984) Direct Polycondensations of Hydroxybenzoic Acids by Use of Diphenyl Chlorophosphate in the Presence of N,N-Dimethylformamide. Journal Polymer Science Polymer Chemistry Edition, 22, 2181-2187.
http://dx.doi.org/10.1002/pol.1984.170220919

has been cited by the following article:

• TITLE: New Synthetic Route to Copoly(Ester-Thioester)s by Direct Polycondensation of Thio-Acids with Diols of Cycloketones Derivatives

  AUTHORS: Nayef S. Al-Muaikel

  KEYWORDS: Synthesis, Characterization, Copoly(Ester-Thioester)s, Polycondensation, Cycloketones

  JOURNAL NAME: Open Journal of Organic Polymer Materials, Vol.6 No.2, April 14, 2016

  ABSTRACT: A new series of copoly(ester-thioester)s had been synthesized using direct polycondensation technique. These copolythioesters were synthesized by direct polycondensation of 4,4'-(tereph-thaloyIdithio) diacetic acid I, 3,3'(isophthaloyl-dithio) diacetic acid II, or 1,8 (sebacoyldithio) diacetic acid III, with 2,6-bis(p-hydroxybenzylidene) tert. butyl cyclohexanone IV and 2,6-divanyli-dene tert. butyl cyclohexanone V, using a condensing agent consisting of pyridine-thionyl clhloride complex. The resulting copolymers were characterized by elemental and spectral analyses, solubility, viscometery, electronic spectra and thermogravimietric analyses. The crystallinity of some copolymers was examined by X-ray diffraction analyses. Furthermore, the morphology of selec ted examples of the copolymers was examined by scanning electron microscopy.