C-NMR studies on the structure of linear p–substituted phenol polymer

Abstract

Linear polymer of p – substituted phenol with Methylene Bridge has been prepared by using condensation polymerization. To this homogeneous reaction mixture of p – substituted phenol (Bisphenol-A; p – hydroxyacetophenone and p – chlorophenol ) along with NaOH solution and formaldehyde was added while stirring. 13C – NMR spectroscopy allowed identification of the linkage formed and qualification of the main functional groups in the p – substituted phenol with methylene bridge; which were greatly influenced by the preparation conditions. Methylene bridges in the linear polymers were found to be mainly associated with the para position linkage methylene unit. The linear p–substituted phenol condensed polymer had no free formaldehyde. p – Substituted dimethylol phenol was indulged into the condensed polymers by reacting with phenolic units to results in condensed methylene bridges. The linear polymer with p – substituted phenol having Methylene Bridge possessed relatively high degree of polymerization and very low percentage of unreacted methylene groups. The synthesized polymer samples were characterization by the 13C – NMR technique excellently.