Influence of reprocessing on the mechanical properties of polyamide 6 containing talc

Abstract

Abstract. In this study, polyamide 6 containing 30wt% talc was reprocessed via injection molding up to eight processing cycles. The effects of reprocessing on the mechanical properties and on the melt viscosity were analyzed by flexural and impact tests and by melt flow index (MFI) tests, respectively. Flexural strength and modulus remained unchanged up to the 5th processing cycle. From the 6th processing cycle, flexural strength and modulus decrease with increasing processing cycles. Similar trend was observed for impact strength, however, the decrease observed in this property was much lower. From the 6th processing cycle, MFI increases with increasing processing cycles, indicating a possible reduction in PA6 molar mass.

Optimization in the reprocessing of recycled polyamide 6 reinforced with 30 wt% Glass Fiber (PA6/GF30) using mixture design

“…PA6 can be filled with synthetic fiber (carbon and glass) or inorganic filler (talc, calcium carbonate, and kaolin) in order to improve its properties and to reduce cost. Several studies focused on the reprocessing of PA6 reinforced with carbon fiber, 29 talc filler, 30 and glass fiber 2,20,31 have been conducted. Kuram et al 2 studied the effects of the number of processing cycles and process parameters on the chemical, thermal and mechanical properties of glass‐fiber reinforced nylon 6 (PA6‐GF) during the injection molding process by using the Taguchi experimental design method.…”