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 language | English |
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Pages (from-to) | 5419-5429 |
Number of pages | 11 |
Journal | Polymer |
Volume | 38 |
Issue number | 21 |
DOIs | |
State | Published - Oct 1997 |
Keywords
- Blend
- Phenolic
- Phenoxy