Extrudate swell and texture of PS, LDPE, ABS, PVC melts and their blends in extrusion capillary flow using a magnetic die
Journal of applied polymer science ,
v.86 no.2 ,
2002년, pp.509 - 517
Sombatsompop, N.
(Division of Materials Technology, School of Energy & Materials, King Mongkut's University of Technology Thonburi (KMUTT), Bangmod, Bangkok 10140, Thailand)
The extrudate swell behavior and extrudate texture of various thermoplastic melts, namely, polystyrene (PS), low-density polyethylene (LDPE), acrylonitrile-butadiene styrene (ABS) copolymer, poly(vinyl chloride) (PVC), and their blends, were examined weith a magnetic die system in a constant-shear-r...
The extrudate swell behavior and extrudate texture of various thermoplastic melts, namely, polystyrene (PS), low-density polyethylene (LDPE), acrylonitrile-butadiene styrene (ABS) copolymer, poly(vinyl chloride) (PVC), and their blends, were examined weith a magnetic die system in a constant-shear-rate capillary rheometer at a shear rate range 5–28 s−1 and a temperature range 170–230 °C. The extrudate swell results obtained from the magnetic die were then compared with those produced by a nonmagnetic die. The results showed that the extrudate swell increased with shear rate, but decreased with temperature. In a pure polymer system, up to 25% increase in the extrudate swell was observed with the application of the magnetic field to the PS melt, and the effect decreased in the order ABS > LDPE > PVC. The extrudate swell changes were associated with the changes in rheological properties of the melts. The extrudate textures of the ABS and PVC melts were improved by the magnetic field. In PS/LDPE or PS/ABS blend, it was found that the magnetic die resulted in higher values of the extrudate swell than the nonmagnetic die for all blends, the magnetic effect being less as the LDPE or ABS content was increased. For PS/LDPE system, the extrudate swell of the PS melt did not change much with addition of 20% LDPE, but slightly decreased at the LDPE loading of 40%. At higher LDPE loadings, the extrudate swell increased towards the value of the pure LDPE melt. For PS/ABS system, the extrudate swell ratio progressively decreased with increasing ABS content. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 509–517, 2002
The extrudate swell behavior and extrudate texture of various thermoplastic melts, namely, polystyrene (PS), low-density polyethylene (LDPE), acrylonitrile-butadiene styrene (ABS) copolymer, poly(vinyl chloride) (PVC), and their blends, were examined weith a magnetic die system in a constant-shear-rate capillary rheometer at a shear rate range 5–28 s−1 and a temperature range 170–230 °C. The extrudate swell results obtained from the magnetic die were then compared with those produced by a nonmagnetic die. The results showed that the extrudate swell increased with shear rate, but decreased with temperature. In a pure polymer system, up to 25% increase in the extrudate swell was observed with the application of the magnetic field to the PS melt, and the effect decreased in the order ABS > LDPE > PVC. The extrudate swell changes were associated with the changes in rheological properties of the melts. The extrudate textures of the ABS and PVC melts were improved by the magnetic field. In PS/LDPE or PS/ABS blend, it was found that the magnetic die resulted in higher values of the extrudate swell than the nonmagnetic die for all blends, the magnetic effect being less as the LDPE or ABS content was increased. For PS/LDPE system, the extrudate swell of the PS melt did not change much with addition of 20% LDPE, but slightly decreased at the LDPE loading of 40%. At higher LDPE loadings, the extrudate swell increased towards the value of the pure LDPE melt. For PS/ABS system, the extrudate swell ratio progressively decreased with increasing ABS content. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 509–517, 2002
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참고문헌 (15)
SPE ANTEC Tech Papers Christodoulou K. J. 915 44 1 1998
Orbey, N., Dealy, J. M..
Isothermal swell of extrudate from annular dies; effects of die geometry, flow rate, and resin characteristics.
Polymer engineering and science,
vol.24,
no.7,
511-518.
SPE ANTEC Tech Papers Swan P. L. 1607 36 1990
Eggen, Svein, Hinrichsen, Einar L..
Swell and distortions of high‐density polyethylene extruded through capillary dies.
Polymer engineering and science,
vol.36,
no.3,
410-424.
Liang, J.Z, Ness, J.N.
The melt die-swell behaviour during capillary extrusion of LDPE/PP blends.
Polymer testing,
vol.17,
no.3,
179-189.
10.1002/1097-4628(20001024)78:4<759::AID-APP90>3.0.CO;2-S
Liang, Ji-Zhao.
Estimation of die-swell ratio for polymer melts from exit pressure drop data.
Polymer testing,
vol.20,
no.1,
29-31.
Sombatsompop, N., Thongsang, S..
Rheology, morphology, and mechanical and thermal properties of recycled PVC pipes.
Journal of applied polymer science,
vol.82,
no.10,
2478-2486.
Sombatsompop, N., Dangtungee, R..
Flow visualization and extrudate swell of natural rubber in a capillary rheometer: Effect of die/barrel system.
Journal of applied polymer science,
vol.82,
no.10,
2525-2533.
Sombatsompop, Narongrit, Patcharaphun, Somjate.
A New Experimental Method for Determining Simultaneously True Radial Temperature Profiles of Polymer Melts under Isothermal Capillary Flow.
Polymer journal,
vol.33,
no.6,
491-494.
Sombatsompop, N, Intawong, N.-T, Intawong, N.-S.
A novel sensing device for pressure measurement in molten polymer systems.
Polymer testing,
vol.19,
no.5,
579-589.
Electrical and Optical Polymer Systems Amundson K. R. 1998
Physics of Plastics: Processing, Properties and Materials Engineering Birley A. W. 1992
Sombatsompop, N., Wood, A. K..
An Examination of Melt Fracture in Molten Polymers.
Polymer-plastics technology and engineering,
vol.37,
no.3,
317-331.
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