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Processability, Structure and Mechanical Properties of Poly(ether imide)/Amorphous Copolyester Blends

✍ Scribed by Ainhoa Granado; José Iqnacio Eguiazábal; Jon Nazábal

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
397 KB
Volume
295
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

Blends of PEI with an amorphous copolyester (PCTG) were obtained by melt‐mixing followed by injection molding. The processability of PEI increased several times upon addition of just 10% PCTG, thus expanding the applications of PEI. All the blends showed a single T~g~ and most of them were transparent. However, they were biphasic as suggested by the widening of the T~g~'s and proved by SEM. A fine dispersed particle size and good adhesion level were also observed by SEM. The values of the modulus of elasticity and the yield stress appeared close the additivity rule, and were attributed to the combined effects of the density increase and orientation decrease in the blends. These morphological changes had a slightly negative influence on ductility which was nevertheless high.

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