Alkyl Substituted Poly phenylene oxides including PPO

5 ALKYL SUBSTITUTED POLY(PHENYLENE OXIDES) INCLUDING PPO 

Alkyl Substituted Poly(phenylene oxides) including PPO 587 

In 1965 the poly-(2,6-dimethyl-/7-phenylene ether) was introduced as polyphenylene oxide (misleadingly ) and also as PPO by the General Electric Co. in the USA and by AKU in Holland. The commercial materials had a molecular weight of 25 000-60 000. 

Using the processes described above, complex products are obtained if a monosubstituted phenol is used instead of a 2,6-substituted material. However, by using as the amine a 2-disubstituted pyridine such as 2-amylpyridine, more linear and, subsequently, useful polymers may be obtained. 

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