Effects of Particle Size on Melt Viscoelastic Properties During Capillary Extrusion of Glass Bead-filled LDPE Composites:
作者： Ji-ZHAO Liang
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摘要: ABSTRACT: In this study, the viscoelastic properties of a low-density polyethylene (LDPE) filled with glass beads (GBs) are measured at 150 C by means capillary rheometer to identify effect particle size on melt viscoelasticity. The volume fraction GB was 8.4%. surface particles has been treated silane-coupling agent and diameter range from 4 180 mm. results showed that either entry pressure drop (Pen) or elongation stress (e) is linear function shear (w) channel wall. values both Pen e these composite melts close each other. This illustrates influence bead its distribution them insignificant low filler concentration. die-swell ratio (B) increases nonlinearly an addition w. When (d) less than 50 mm, B decreases dramatically increase d, especially level, then it slightly under...
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