Binary blends of polyamide 6 with aliphatic polyketone: the compatibility analysis of polymer components
https://doi.org/10.29235/1561-8323-2024-68-2-170-176
Abstract
The compatibility and interactions of polyamide 6 (PA6) and aliphatic polyketone (APK) were studied when they were mixed in a melt by extrusion. Using the relaxation spectrometry (RS) method, it was shown that the studied PA6/ APK blends had one glass transition temperature (Тg) located on the temperature scale between Тg of initial PA6 and APK. It was also found that in these mixtures, the PA6 b-relaxation peak, responsible for the local movement of small-scale structural units of the main chain and side branches, was socialized with the b-peak of APK. On this basis, conclusions were drawn about the compatibility of PA6 and APK at the segmental and small-scale level. The mutual influence of polymer components of PA6/APK blends on the dynamic shear modulus and the zG3 criterion is shown. The DSC analysis has revealed a slowdown in the crystallization of PA6 and APK in their blends, which is probably due to the formation of extensive interfacial (transitional) layers in the PA6/APK blend, in which crystallization of polymer components is hindered due to intermolecular interactions. The analysis of the IR-spectra in the range of 3000–3800 cm–1 has made it possible to establish the formation of hydrogen bonds between the polyamide –NH-groups and carbonyls –C=O, being part of APK, which contributes to an increase in the compatibility of the polymer components of the blend under study.
About the Authors
Yu. M. Krivoguz
V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Yuri M. Krivoguz – D. Sc (Engineering), Associate Professor, Head of the Sector
32a, Kirov Str., 246050, Gomel
V. N. Usova
V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Viktoriya N. Usova – Junior Researcher, Postgraduate Student
32a, Kirov Str., 246050, Gomel
V. N. Koval
V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Vasili N. Koval – Ph. D. (Engineering), Head of the Department
32a, Kirov Str., 246050, Gomel
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