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【期刊论文】A Rheological Model for the Interface of Immiscible Polymer Melt in Blending Process
周持兴
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-1年11月30日
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【期刊论文】A new method to determine interfacial tension from the retraction of ellipsoidal drops
周持兴
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-1年11月30日
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48浏览
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周持兴
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-1年11月30日
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33浏览
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50浏览
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【期刊论文】A Rheological Model for Polymer Melts with Internal Structure in Flow Fields*
周持兴, ZHOU Chixing
,-0001,():
-1年11月30日
Conceptually, an imagined conformation ellipsoid is supposed to represent the shape of a polymer chain for polymer melts in flow fields and to be equivalent to the volume element in mathematical sense in continuum mechanics. A power law dependence of shear modulus of polymer melts on detC, referred to as envelope volume, is proposed. Based on those assumptions and the non-linear relation of shear modulus, a phenomenological viscoelastic model is derived. The model is tested in simple shear flow, simple elongational flow, oscillatory shear flow, and relaxation process after flow suddenly stopped. The results show that the model works well to predict the change of internal structure and viscoelastic performance of polymer melts in flow fields.
Polymer melts,, Rheological model,, Polymer conformation,, Flow fields
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