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A novel method is used for the preparation of new linear polymer from p-substituted phenol with Methylene Bridge like –Cl, -COOH, -NO2 etc. and these polymers have been characterized by IR, NMR and TGA method. We have studied the thermal analysis from TG thermogram to obtain the activation energy, structural analysis and effect of p-substituted groups on dielectric constant/loss.

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.

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