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Analysis of melt spinning master‐curves of low density polyethylene
Author(s) -
Liang JiZhao,
Zhong Lei,
Wang Kejian
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.36421
Subject(s) - low density polyethylene , melt spinning , materials science , extrusion , rheology , spinning , polyethylene , extensional viscosity , viscosity , melt flow index , scaling , viscoelasticity , thermodynamics , compaction , logarithm , composite material , polymer , mathematics , geometry , copolymer , physics , mathematical analysis , shear viscosity
The extensional rheological properties of a low density polyethylene (LDPE) melt were studied by using melt spinning technique. Based on the extension properties of the LDPE melt under experimental conditions, the melt spinning master‐curves were plotted by introducing scaling factor b and the draw ratio λ. The scaling factor b shows the combination effects on the preorientation before extension, the unwrapping and orientation of molecular chains during extension. Several linear relationships between b and temperature, log b and the logarithm of extrusion flow rate v 0 (log v 0 ) have been investigated. By using the values of b and the reference curve, the extension viscosity curves with different temperature and extrusion flow rate could be calculated, thus the measurement range of melt spinning technique would be extended effectively. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012