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Phase behaviour of polyamide—polyester blends: the influence of aromaticity

✍ Scribed by T.S. Ellis

Book ID
104164585
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
491 KB
Volume
38
Category
Article
ISSN
0032-3861

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✦ Synopsis

Miscibility in blends of semi-aromatic polyamides and random aliphatic co-polyesteramides, derived from ecaprolactam, e-caprolactone and laurolactam has been investigated by calorimetric methods. Dilution of ecaprolactam by e-caprolactone in PA-6 transforms miscible blends based on PA-6I and PA-TMDT, respectively, to immiscible mixtures at approximately 35 and 46 mol%, respectively, of e-caprolactone in the copolymer. The data have been found to conform to an analysis provided by a binary interaction model incorporating segmental interaction parameters, Xu, derived from related blends. Extension of the treatment to polyamide/polyester blends whose constituents contain aromaticity, e.g. PA-66/poly(ethylene terephthalate), PET and PA-6I/polyarylate, PAr, has also been explored. The results confirm the gross immiscibility, indicated by a large unfavourable interaction parameter, typically encountered in these blends.

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