SOME ASPECTS ON THE CONSTITUTION OF EGYPTIAN EICHHORNIA CRASSIPESPHENOL POLYCONDENSATE RESINS
Titel:
SOME ASPECTS ON THE CONSTITUTION OF EGYPTIAN EICHHORNIA CRASSIPESPHENOL POLYCONDENSATE RESINS
Auteur:
Sayyah, S. M. Khalil, A. B. Ghazy, M. B.
Verschenen in:
International journal of polymeric materials
Paginering:
Jaargang 51 (2002) nr. 11 pagina's 981-1004
Jaar:
2002-11
Inhoud:
Infrared spectroscopic studies on some phenolic resins prepared by condensation of phenol with furfural, xylose, glucose, holocellulose, resistant cellulose, pure soda lignin and Egyptian Eichhornia Crassipes, were carried out. The IR spectrum of soda lignin-phenol resin proves the presence of aliphatic methyl, methylene, methine and strong bonded OH groups. Drastic changes in band position and intensity are observed in the IR spectra of pure soda lignin or Egyptian Eichhornia Crassipes and the respective phenolic resins, indicating that degradation processes could take place during the condensation reactions. The IR spectra of fractions of the Egyptian Eichhornia Crassipes-phenol resin give an insight into the complicated structure of this resin. 1 H-NMR and UV-spectroscopic studies confirm the IR data.