Synthesis and characterization of A(2) + B-3-type hyperbranched aromatic polyesters with phenolic end groups

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Zhirong Fan - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Albena Lederer - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Brigitte Voit - , Leibniz Institute of Polymer Research Dresden (Autor:in)

Abstract

Hyperbranched (hb) aromatic polyesters with phenolic end groups were synthesized according to the A(2) + B-3 approach both, by solution polymerization and by melt (bulk) polymerization with different monomer ratios (A(2):B-3). The hb polyesters produced from solution polymerization exhibited higher yields, molar masses and glass transition temperature (T-g) compared to the products prepared in the melt. The resulting hb aromatic polyesters from the A(2) + B-3 approach were also compared with their properties to lib aromatic polymers produced from the well known AB(2) monomer 3,5-bis-(triniethylsiloxy)benzoyl chloride. Both types of hb aromatic polyesters possess high T-g, high thermal stability and good solubility in common organic solvents. A typical melt viscosity behavior with shear thinning effect was also observed for both. Thus similar polymer properties compared to melt-condensed products were obtained with the A(2) + B-3 approach by solution polycondensation possessing the advantage of easy monomer availability and much milder polymerization conditions (at room temperature in solution) compared to the AB(2) approach. (C) 2009 Elsevier Ltd. All rights reserved.

Details

OriginalspracheEnglisch
Seiten (von - bis)3431-3439
Seitenumfang9
FachzeitschriftPolymer
Jahrgang50
Ausgabenummer15
PublikationsstatusVeröffentlicht - 17 Juli 2009
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

Scopus 67650088605
ORCID /0000-0002-4531-691X/work/148607783

Schlagworte

Schlagwörter

  • A(2) + B-3 approach, Hyperbranched aromatic polyesters, Solution polymerization