Rheological and Thermal Properties of Polyamide 6 and Polyamide 6/Glass Fiber Composite with Repeated Extrusion

다국어 초록 (Multilingual Abstract)

In this study, the rheological, mechanical, and thermal properties of polyamide 6 (PA6) and PA6/glassfiber (GF) composite with repeated extrusions were investigated. The complex viscosity of the PA6 was found todecrease with the increase of repeated extrusion. The decrease in complex viscosity was due to the decrease in themolecular weights of the PA6. The decrease in tensile strength of the PA6(GF) was due to the continuous choppingof the glass fibers with repeated extrusion, as well as the decrease in molecular weight of the PA6. The half crystallizationtime of the PA6 and PA6(GF) decreased, with the increase of repeated extrusion. The fraction of the 1-timerepeated extrusion of the PA6 (PA6-A) in the PA6/PA6-A blend was obtained from the ratio of the complex viscosityof the PA6-A blend, and the complex viscosity of the PA6. A rheological method is presented that can estimate thefraction of the repeated extrusion of the polymer from the virgin polymer/repeated extrusion of the polymer mixtures.

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