Hydrogen bonding in the novolac type phenolic resin blended with phenoxy resin

Hew Der Wu, Chen Chi M. Ma, Peter P. Chu

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The hydrogen bond formation between novolac type phenolic resin (phenolic) and polyhydroxyl ether of bisphenol A (Phenoxy resin) were verified by infra-red (i.r.), gel permeation chromatography (g.p.c.) and nuclear magnetic resonance (n.m.r.). The i.r. spectrum of the 'free' hydroxyl group of the blend shows a maximum absorption area with 25 wt% phenoxy which coincides with the lowest point of the glass transition temperature (Tg) is observed. In the phenolic-rich region, almost all the hydroxyls of the phenoxy interact with the phenolic resin. The carbonyl group of benzoylated phenoxy (Bz-phenoxy) confirms further the association of hydrogen bonding with hydroxyls of phenolic resin. It was found that phenolic resin interpenetrates with the phenoxy and Bz-phenoxy and causes significant decreasing of Tg.

Original languageEnglish
Pages (from-to)5419-5429
Number of pages11
JournalPolymer
Volume38
Issue number21
DOIs
StatePublished - Oct 1997

Keywords

  • Blend
  • Phenolic
  • Phenoxy

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