@article{OkatovaAndreevaSchulz1996,
  author    = {Okatova, Olga V. and Andreeva, Katharina A. and Schulz, Burkhard},
  title     = {Thermal hydrolytic degradation of polyoxadiazole derivatives},
  year      = {1996},
  language  = {en}
}
@article{OkatovaAndreevaSchulzetal.1999,
  author    = {Okatova, Olga V. and Andreeva, Katharina A. and Schulz, Burkhard and Lavrenko, Peter N.},
  title     = {Degradation of poly(m-phenylene oxadiazole) in concentrated sulfuric acid},
  year      = {1999},
  language  = {en}
}
@article{LavrenkoOkatovaSchulzetal.1999,
  author    = {Lavrenko, Peter N. and Okatova, Olga V. and Schulz, Burkhard and Andreeva, Katharina A. and Strelina, Irina A.},
  title     = {Hydrodynamic and dynamo-optical properties of poly(1,3-phenylene-1,3,4-oxadiazole) molecules in sulphuric acid},
  year      = {1999},
  abstract  = {Translational diffusion of the macromolecules, intrinsic viscosity and flow birefringence induced in dilute solutions of poly(1,3-phenylene-1,3,4-oxadiazole) (PMOD) in conc. sulphuric acid has been investigated. Molecular-weight dependences of hydrodynamic and dynamo-optical properties are established over the M range from 8.1 103 to 87 103. Experimental data agree well with the theories developed for translational friction and intrinsic viscosity of the wormlike chains with the following molecular parameters: mass per chain unit ML = 22.7 Dalton/{\AA}, the Kuhn segment length A = 59 ± 4 {\AA}, the chain diameter d = 4 ± 1.5 {\AA}. Hindrance to intramolecular rotation is characterized by the parameter s = 1.7. The shear optical coefficient was found to be approximately 1.7 times lower the value of that obtained in the same solvent for the para-phenylene isomer of this polymer, being in good agreement with higher equilibrium flexibility of the PMOD molecule chains in solutions as determined herein from the hydrodynamic data.},
  language  = {en}
}
@article{LavrenkoAndreevaStrelinaetal.1999,
  author    = {Lavrenko, Peter N. and Andreeva, Katharina A. and Strelina, Irina A. and Garmonova, Tatjana I. and Schulz, Burkhard},
  title     = {Optical anisotropy and flexibility of poly(m-phenylene oxadiazole) in sulfuric acid},
  year      = {1999},
  language  = {en}
}