Effects of extrusion conditions on die-swell behavior of polypropylene/diatomite composite melts
Source abstract
Abstract
Abstract Die-swell is an important parameter for characterization of elastic properties during extrusion of polymeric melts, and the degree of swell is usually expressed by die-swell ratio ( B ). The swell ratio for polypropylene composites filled with diatomite with different particle sizes (volume fraction of 10%) was measured by means of a melt flow rate instrument to investigate the effects of die geometry and extrusion conditions on the die-swell behavior of the composite melts with temperature varying from 210 to 230 °C and load varying from 5 to 12.5 kg. The results showed that B of the composites increased nonlinearly with increase of shear stress and shear rate, while it decreased linearly with rise of temperature. When load and temperature were constant, B increased nonlinearly with increase of the die diameter, whereas it reduced nonlinearly with increase of the die length/diameter ratio.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Rheology and Fluid Dynamics Studies · Polymer crystallization and properties · Material Properties and Processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
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1. The influence of excess coupling agent on the microdeformation processes and mechanical properties of poly(propylene)/wood–flour composites10.1002/mame.200500409 ↗
2. Mechanical properties of talc- and CaCO3-reinforced high-crystallinity polypropylene composites10.1007/s10853-006-7171-x ↗
3. Morphology and properties of particulate filled polymers10.1002/masy.200451009 ↗
4. Tensile properties and morphology of PP/EPDM/glass bead ternary composites10.1002/pc.10367 ↗
5. Microdamage and interfacial adhesion in glass bead-filled high-density polyethylene10.1007/BF01165998 ↗
6. A model for filler-matrix debonding in glass-bead-filled viscoelastic polymer10.1002/(SICI)1097-4628(19970906)65:10<2013::AID-APP19>3.0.CO;2-6 ↗
7. Surface-modified calcium carbonate particles by admicellar polymerization to be used as filler for isotactic polypropylene10.1016/j.colsurfa.2005.09.029 ↗
8. iPP based nanocomposites filled with calcium carbonate nanoparticles: structure/properties relationships10.1002/masy.200650220 ↗
9. Simple formulate for the effective moduli of unidirectional aligned composites10.1002/pen.10243 ↗
10. Debinding of injected parts using an abnormal glow discharge10.1016/j.msea.2005.06.026 ↗
11. Heat transfer in polymer composites filled with inorganic hollow micro-spheres: I. A theoretical model10.1016/j.polymertesting.2007.07.002 ↗
12. An experimental investigation of the effect of temperature on recovery of heavy oil from diatomite10.2118/83915-PA ↗
13. Properties of heat-insulating materials10.1007/s11148-005-0077-3 ↗
14. Experimental study of macro- and microbehavior of natural diatomite10.1061/(ASCE)1090-0241(2006)132:5(603) ↗
15. Effect of the diameter ratios on entry pressure drop and die-swell behavior for rubber compound in capillary extrusion
16. The end pressure losses during short die extrusion of LLDPE melt10.1016/S0142-9418(98)00091-9 ↗
17. Melt rheology of nanometre-calcium-carbonate-filled acrylonitrile-butadiene-styrene (ABS) copolymer composites during capillary extrusion10.1002/pi.1091 ↗
18. Research into polymer melt die swell during extrusion