The synthesis, characterization and thermal stability of oligo-4-hydroxybenzaldehyde

Mart H., Yuruk H., Sacak M., Muradoglu V., Vilayetoglu A.

POLYMER DEGRADATION AND STABILITY, vol.83, no.3, pp.395-398, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 83 Issue: 3
  • Publication Date: 2004
  • Doi Number: 10.1016/j.polymdegradstab.2003.08.003
  • Journal Name: POLYMER DEGRADATION AND STABILITY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.395-398
  • Keywords: oxidative polycondensation, oligo-4-hydroxybenzaldehyde, thermal stability
  • Ankara University Affiliated: No

Abstract

Oligo-4-hydroxybenzaldehyde (OHBA) was synthesized from the oxidative polycondensation of 4-hydroxybenzaldehyde (HBA) with hydrogenperoxide (H2O2) in an aqueous alkaline medium at 85 degreesC. The product was characterized by H-1 NMR, FT-IR, UV-Vis and elemental analysis. The number average molecular weight, mass average molecular weight and polydispersity index values of OHBA were found to be 5171, 8625 g mol(-1) and 1.668, respectively. The thermal stability of the oligomer was measured by thermogravimetric analyses (TG) under an air atmosphere. TG analyses showed OHBA to be resistant to thermo-oxidative decomposition. The weight loss of OHBA was found to be 5, 50 and 89% at 171, 845 and 900 degreesC, respectively. According to TG analyses, the carboneous residues of the OHBA was 49.29% at 900 degreesC. (C) 2003 Elsevier Ltd. All rights reserved.