Melting and recrystallization of PA-6/PA-66 blends

The morphology of a number of polyamides (PA)—namely, PA‐66, PA‐6/PA‐66 blends, and PA‐6/PA‐66 copolymers—prepared from HCOOH solution and from the melt has been examined as well as the effect of annealing. In the blends, the PA‐6 crystallizes within the PA‐66 spherulites. When prepared from HCOOH s...

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Published in:Journal of applied polymer science 1993-08, Vol.49 (7), p.1175-1188
Main Authors: Rybnikár̆, Frantis̆ek, Geil, P. H.
Format: Article
Language:English
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Applied sciences
Crystallization
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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description The morphology of a number of polyamides (PA)—namely, PA‐66, PA‐6/PA‐66 blends, and PA‐6/PA‐66 copolymers—prepared from HCOOH solution and from the melt has been examined as well as the effect of annealing. In the blends, the PA‐6 crystallizes within the PA‐66 spherulites. When prepared from HCOOH solution at 25°C, the PA‐66‐containing samples show a large exothermic peak before the sample melting peak is observed by DSC. This exothermic peak, which cannot be fully explained by previously known observations, PA recrystallization, and/or the morphology changes we describe here, is not seen for PA‐6 or for PA‐66 prepared from HCOOH solution at 100°C. © 1993 John Wiley & Sons, Inc.
doi_str_mv 10.1002/app.1993.070490706
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source Wiley Online Library Polymer Backfiles; Wiley Online (Archive)
subjects Applied sciences
Crystallization
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
title Melting and recrystallization of PA-6/PA-66 blends
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