Low Dielectric Loss Copolymer Obtained from 2,6-Dimethylphenol and 2-Allyl-6-methylphenol via Cu-catalyzed Oxidative Coupling Polymerization
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-methylphenol (10 mol %) with 2,6-dimethylphenol (90 mol %), using large amounts of pyridine. Allyl-PPE with a narrow MWD showed a lower dielectric constant (ε′) and dielectric loss tangent (tan δ) than copolymers with a broad MWD.
- Chemistry letters
Chemistry letters 36(2), 238-239, 2007-02-05
The Chemical Society of Japan