Hyperbranched poly(ether amide)s via nucleophilic ring opening reaction of oxazolines

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • F. Bohme - (Autor:in)
  • C. Clausnitzer - (Autor:in)
  • S. Grutke - (Autor:in)
  • T. Huber - (Autor:in)
  • P. Potschke - (Autor:in)
  • B. Voit - , Leibniz-Institut für Polymerforschung Dresden (Autor:in)
  • F. Gruber - (Autor:in)

Abstract

The nucleophilic ring opening addition reaction of phenol groups towards oxazoline units has been used for the preparation of hyperbranched poly(ether amide)s. For this the AB:! monomer 2-(3,5-bishydroxyphenyl)-1,3-oxazoline was synthesized and converted in a highly branched polymer in bulk or solution at temperatures above 190 degreesC. The resulting hyperbranched polymers exhibit a degree of branching of 50%, as verified by high-resolution NMR spectroscopy, and are highly soluble in polar organic solvents, for example DMF and DMAc, with low solution viscosity. Their glass transition temperatures are in the region of 170 degreesC and degradation does not start below 300 degreesC. Melt rheology measurements revealed a predominantly elastic behaviour with a relatively high viscosity at low frequency. A lower melt viscosity was achieved by end group modification. Hyperbranched poly(ether amide)s with phenolic and acetate end groups are fully miscible with linear polyamide. When a small amount of the hyperbranched material is added to the PA6 matrix a significant reduction of the melt viscosity could be achieved without changing the mechanical properties of the matrix polymer.

Details

OriginalspracheEnglisch
Seiten (von - bis)S21-S31
Seitenumfang11
FachzeitschriftHigh Performance Polymers
Jahrgang13
Ausgabenummer2
PublikationsstatusVeröffentlicht - Juni 2001
Peer-Review-StatusJa
Extern publiziertJa

Konferenz

TitelPolycondensation 2000 Conference
Dauer18 - 21 September 2000
StadtTOKYO
LandJapan

Externe IDs

Scopus 0035361076
ORCID /0000-0002-4531-691X/work/148607654

Schlagworte

Schlagwörter

  • Thermal polymerization, Aromatic polyamide, Glass-transition, Graft-copolymers, End-groups, Polymers, Blends, Polyesters, Terephthalate-co-oxybenzoate)s, Polycondensation