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Melt Flow Improvement of Polyamide 6/Glass Fiber Composite Using Amide-type Lubricant

In this study, low molecular weight amide-type lubricant was synthesized to improve flow properties of polyamide6(PA6)/glass fiber(GF) composites. Low molecular weight amide-type lubricant (N,N'-bis(2,2,6,6,-tetramethylpiperidin-4-yl)-1,3-dicarboxamide) was synthesized by condensation reaction under room temperature or high temperature condition. The performance analysis was performed according to the synthesis conditions. FTIR spectroscopy was used to examine the chemical bond of synthesized lubricants. The synthesized lubricants mixed in the polyamide resin decreased its axial force of twin screw compounder compared with the pristine polyamide resin. The PA6/ GF35% composites with synthesized lubricants provided a 72% increase of the melt flow index, seemingly by decreasing bonding force among the molecular chains.