Linear phenol‐formaldehyde polymers—dehalogenation of <i>p</i>‐chlorophenol‐formaldehyde polymers

Abstract

Abstract High molecular, linear phenol‐formaldehyde polymers were prepared by the dehalogenation of the corresponding p ‐chlorophenol‐formaldehyde polymers with sodium in liquid ammonia. The phenol‐formaldehyde polymers and their acetyl derivatives were soluble in acetone and N , N ‐dimethylformamide. Infrared studies were consistent with a structure having methylene bridges between the ortho positions of the phenolic residues.