The synthesis and thermal properties of oligo-3-hydroxybenzaldehyde synthesized by oxidative polycondensation
Küçük Resim Yok
Tarih
2006
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
JOHN WILEY & SONS INC
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Polymerization of 3-hydroxybenzaldehyde was investigated by oxidative polycondensation (OP) method. No polycondensation reaction was observed both in acidic (in CH3COOH) and organic (in THF) media. Polycondensation was carried out with hydrogenperoxide (H2O2) in an aqueous alkaline medium at 90 degrees C. The product was characterized by H-1 NMR, C-13 NMR, FTIR, UV-vis, and elemental analysis. The number average molecular weight, mass average molecular weight, and polydispersity index values of O-3HBA were found to be 3600, 8000 g mol(-1), and 2.22, respectively. The product (O-3HBA) with reactive aldehyde and hydroxyl group was soluble in most polar organic solvents and was composed of phenylene units. Thermal properties of the oligomer were investigated by thermogravimetric analyses under an air atmosphere. The weight loss of O-3HBA was found to be 5 and 50% at 231 and > 1000 degrees C, respectively. The carboneous residue of the O-3HBA was 54% at 1000 degrees C. (c) 2006 Wiley Periodicals, Inc.
Açıklama
Anahtar Kelimeler
oxidative polycondensation, polyaromatics, polyphenols, oligomers
Kaynak
JOURNAL OF APPLIED POLYMER SCIENCE
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
101
Sayı
2
