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Thermomechanical and Rheological Properties of High-Molecular-Weight Poly(ethylene oxide)/Novolac Blends

✍ Scribed by Debdatta Ratna; Thomas Abraham; József Karger-Kocsis

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
370 KB
Volume
209
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Blends of poly(ethylene oxide) (PEO) and novolac‐type phenolic resin were investigated for potential use as a crystallizable switching component for shape‐memory polymer systems with adjustable switching temperature. High‐molecular‐weight PEO and novolac blends with low novolac content were studied. Dynamic and isothermal DSC studies indicated a significant decrease in the crystallization temperature as a result of incorporation of novolac. We investigated the spherulitic morphology using a cross‐polarized optical microscopy and found a decrease in size and regularity of the spherulites with increasing novolac content. The rheological and mechanical properties corroborated the existence of strong interactions through H‐bonding in the amorphous phase.

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