Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Letter
Preparation of High-molecular-weight Phenolic Resins by means of a Phase-separation Reaction System
Pengfei WangTomoki OgoshiTada-Aki YamagishiYoshiaki Nakamoto
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2010 Volume 39 Issue 4 Pages 422-423

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Abstract

High-molecular-weight o-cresol resins with narrow-molecular-weight distribution were prepared using a phase-separation reaction system. The prepared o-cresol resins included a trace of monomer, so that the molecular-weight distribution was narrow. In high molecular weight o-cresol resin, the fractions of orthoortho′, orthopara′, and parapara′ methylene linkages were close to 25%, 50%, and 25%, respectively. This indicated that the reactivity of the ortho position was equal to that of the para position. It was found that the o-cresol ring was highly activated in phase separation reaction system using H2SO4/acetic acid.

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© 2010 The Chemical Society of Japan
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