Thixotropy-loop tests by using upper convected differential Maxwell-type model with kinetic theory

Shu-xin Huang

doi:10.1007/s11771-007-0211-0

Journal of Central South University ›› 2007, Vol. 14 ›› Issue (Suppl 1) : 43 -45. DOI: 10.1007/s11771-007-0211-0

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Thixotropy-loop tests by using upper convected differential Maxwell-type model with kinetic theory

Shu-xin Huang ¹^,^a

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Abstract

The thixotropy-loop tests of a LDPE (PE-FSB-23D022/Q200) melt were described in the present paper by using the simplified Acierno-type constitutive equation, which was formed by a modified upper convected Maxwell model and a kinetic equation. The simplified Acierno model is a single-mode equation and only contains three parameters. The descriptions of the simplified Acierno model show partial agreements with the triangular-form thixotropy loop tests of the LDPE melt, in which the calculations of the model show agreement with the tests experiencing short- and medium-time shearing, but show some deviation with the experiment experiencing long-time shearing. The simplified Acierno model can reflect some typical viscoelastic properties of the melt.

Keywords

thixotropy-loop tests / LDPE melt / simplified Acierno-type equation

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Shu-xin Huang. Thixotropy-loop tests by using upper convected differential Maxwell-type model with kinetic theory. Journal of Central South University, 2007, 14(Suppl 1): 43-45 DOI:10.1007/s11771-007-0211-0

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References

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[3]	AciernoD., la MantiaF. P., MarrucciG., et al.. A nonlinear viscoelastic model with structure-dependent relaxation times: I. basic formulation[J]. Journal of Non-Newtonian Fluid Mechanics, 1976, 1(2): 125-145

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