Polymer Science Series B

, 53:456 | Cite as

Synthesis and properties of hyperbranched copolymers based on perfluorinated germanium hydrides

  • O. G. Zamyshlyayeva
  • Yu. D. Semchikov
  • K. V. Kir’yanov
  • E. R. Gasilova
  • M. A. Simonova
  • A. P. Filippov
  • A. V. Kozlov
  • G. A. Shandryuk
  • M. N. Bochkarev
Polycondensation

Abstract

Hyperbranched copolymers of various structures and molecular masses in the range 2.0 × 104−4.4 × 105 are prepared via the activated copolycondensation of tris- and bis(pentafluorophenyl)germane in tetrahydrofuran performed in the presence of triethylamine as an activator. The kinetics of copolycondensation is studied via the method of heat-conduction reaction calorimetry. It is found that tris(pentafluorophenyl)germane shows a higher activity in copolycondensation than bis(pentafluorophenyl)germane. Shear moduli, loss factors, and glass-transition temperatures of the copolymers are determined by dynamic mechanical analysis and differential-scanning calorimetry. The copolymers feature glass-transition temperatures up to 250°C. These values are considerably higher than those of perfluorinated polyphenylenegermane (162°C).

Keywords

Heat Release Polymer Science Series Polycondensation Dynamic Mechanical Analysis Hyperbranched Polymer 

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • O. G. Zamyshlyayeva
    • 1
  • Yu. D. Semchikov
    • 1
  • K. V. Kir’yanov
    • 1
  • E. R. Gasilova
    • 2
  • M. A. Simonova
    • 2
  • A. P. Filippov
    • 2
  • A. V. Kozlov
    • 3
  • G. A. Shandryuk
    • 4
  • M. N. Bochkarev
    • 5
  1. 1.Nizhni Novgorod State UniversityNizhni NovgorodRussia
  2. 2.Institute of Macromolecular CompoundsRussian Academy of SciencesSt. PetersburgRussia
  3. 3.St. Petersburg State Technological University of Plant PolymersSt. PetersburgRussia
  4. 4.Topchiev Institute of Petrochemical SynthesisRussian Academy of SciencesMoscowRussia
  5. 5.Razuvaev Institute of Organometallic ChemistryRussian Academy of SciencesNizhni NovgorodRussia

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