Thermophysical Properties of Polyamide 6 and High-Density Polyethylene Blends (Part 1. Without Compatibilization)

Abstract

The structure and thermophysical properties of polymer blends polyamide 6/high-density polyethylene with component ratios of 70:30, 45:55 and 30:70, which not only provide phase inversion of the blended polymers, but also the formation of an interpenetrating network, have been investigated by differential scanning calorimetry, scanning electron microscopy and light flash method. The data on the influence of blends composition on their mechanical properties, density, structure, temperature, as well as melting and crystallization heats of polymer components have been obtained. The regularities of changes in thermal diffusion, heat capacities and thermal conductivity coefficients of polyamide 6 and high-density polyethylene individually and as part of the blends in dependence on their composition and temperature have been established. A nonlinear increase of the thermal conductivity coefficient from temperature was revealed when melting a more easily melting component of the blend. It was found that the maximum increase in thermal conductivity occurs in the blend forming an interpenetrating network. A possible way of creating composites with adaptive thermal conductivity by melting one of the components of the blend is proposed.

Keywords

Polymer blend / Interfacial interaction / Thermal conductivity / Thermal diffusivity / Heat capacity / Interpenetrating polymer network

Author Contributions

Conceptualization, S.P.B.; Methodology, S.P.B. and V.V.S.; Investigation, S.P.B. and V.V.S.; Writing—Original Draft Preparation, S.P.B. and V.V.S.; Writing—Review & Editing, S.P.B.

Ethics Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

The data used to support the results of this study are available from the corresponding author upon request.

Funding

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.

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