Influence of Molar Ratio of P-Tert-Octyl Phenol and Formaldehyde on Structure of the Resin

Abstract

Phenolic resins with different molecular weight were synthesized by the adjustment of phenolic aldehyde, with p-tert-octyl phenol and formaldehyde as materials. Softening point, gel permeation chromatography and 1 H NMR Spectroscopy were used to characterize its structure. With the same molar ratio of p-tert-octyl phenol and formaldehyde, a resin with the softening point of 93.1˚C, the mean molecular weight of 1050 and relatively concentrated distribution of molecular weight was made. Results indicate that the expected molecular weight, molecular weight distribution and structure of resin can be made by the control of molar ratio of p-tert-octyl phenol and formaldehyde. Keywords