The Effects of Polymerization Catalyst Systems on the Synthesis of Poly(2,6-dimethyl-1,4-phenylene ether) | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

1106736

Reference Type

Journal Article

Title

The Effects of Polymerization Catalyst Systems on the Synthesis of Poly(2,6-dimethyl-1,4-phenylene ether)

Author(s)

Lee, CJ; Kim, YT; Kim, J; Kim, JH; Nam, SW; Jeon, B; Kim, YJ

Year

2012

Volume

Issue

Page Numbers

98-103

Web of Science Id

WOS:000300542300016

Abstract

Poly(2,6-dimethyl-1,4-phenylene ether) (PPE) was synthesized using Cu(NO2)(2)center dot 3H(2)O or CuCl catalyst with various amounts of ligand and base in several different solvent systems. CuCl/1-methylimidazole/ammonium hydroxide was found to be an effective catalyst system which showed the highest polymer yield and molecular weight. The effects of catalyst/monomer ratio, different amine ligands, and the content of mono-functional reagent 2,4,6-trimethylphenol (IMP) additive on the polymer yield and molecular weight were investigated. Among the co-solvent systems used in this polymerization, chloroform/methanol 9/1(v/v) gave the highest polymer yield and molecular weight ((M) over bar (n) 55 K, (M) over bar (w) 92 K, PDI 1.7). The catalytic activity between CuCl and CuI was compared by oxygen-uptake experiments and the formation of sideproduct, 5,5 '-tetramethyl-4,4'-diphenoquinone (DPQ), was analyzed by ultraviolet spectroscopy.

Keywords

poly(phenylene ether); engineering plastic; oxidative coupling; oxygen-uptake; DPQ; PPE