PHENOL-FORMALDEHYDE RESOL RESINS STUDIED BY C-13-NMR SPECTROSCOPY, GEL PERMEATION CHROMATOGRAPHY, AND DIFFERENTIAL SCANNING CALORIMETRY

摘要

A series of phenol-formaldehyde resins was produced in the presence of NaOH catalyst. Detailed structural and quantitative information was provided by C-13-NMR spectroscopy. The main interests were the relative quantities of bridge structures, methylol groups, and free phenol. Functionality and linearity of resins were also studied. The effects of the condensation F/P molar ratio on the structure and properties of the resins was studied by gel permeation chromatography (GPC) and differential scanning calorimetry (DSC) in addition to C-13-NMR. (C) 1997 John Wiley & Sons, Inc. [References: 31]