H. Mart, H. Yürük, M. Saçak
Mar 1, 2004
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Journal
Polymer Degradation and Stability
Abstract
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 °C. The product was characterized by 1H 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 °C, respectively. According to TG analyses, the carboneous residues of the OHBA was 49.29% at 900 °C.