Low Dielectric Loss Copolymer Obtained from 2,6-Dimethylphenol and 2-Allyl-6-methylphenol via Cu-catalyzed Oxidative Coupling Polymerization

摘要

A method for synthesizing a novel thermosetting poly(2-allyl-6-methylphenol-co-2,6-dimethylphenol) (Allyl-PPE) with a narrow molecular weight distribution (MWD) has been developed.Allyl-PPE was prepared by a pyridine/copper(I) chloride-catalyzed oxidative coupling polymerization of 2-allyl-6-meth-ylphenol (10mol%) with 2,6-dimethylphenol (90mol%),using large amounts of pyridine.Allyl-PPE with a narrow MWD showed a lower dielectric constant (epsilon') and dielectric loss tangent (tan delta) than copolymers with a broad MWD.