By Yarin A.L., Pourdeyhimi B., Ramakrishna S.
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This sequence offers an invaluable, applications-oriented discussion board for the subsequent new release of macromolecules and fabrics. purposes comprise non-linear optical fabrics, forte magnetic fabrics, liquid crystals, anticancer and antiviral medicinal drugs, remedy of arthritis, antibacterial medicinal drugs, antifouling fabrics, remedy of definite nutrition deficiencies, electric conductors and semiconductors, piezoelectronic fabrics, electrodes, UV absorption purposes, super-strength fabrics, particular lubricants and gaskets, selective catalytic and multi-site catalytic brokers.
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Online Etimology Dictionary, 2013. term= ﬁber. Accessed July 27, 2013. Pearson, J. R. , 1985. Mechanics of Polymer Processing. Elsevier, London. Pearson, J. R. , 1969. Spinning a molten threadline. Stability. Ind. Eng. Chem. Fundam. 8, 605–609. Petrie, C. J. , Denn, M. , 1976. Instabilities in polymer processing. AIChE J. 22, 209–236. , Teo, W. , Lim, T. , 2005. An Introduction to Electrospinning and Nanoﬁbers. World Scientiﬁc, Singapore. Reneker, D. , 1996. Nanometer diameter ﬁbers of polymer, produced by electrospinning.
E. seemingly correspond to the power-law RCE (Eq. 10) with n < 1. However, in strong enough uniaxial elongational ﬂows, which are the most relevant case for the ﬁber-forming processes, the effective elongational viscosity does not follow the shear-thinning pattern and can increase with the stretching rate. The latter formally corresponds to shear-thickening with n > 1 for the same ﬂuid. This contradiction shows that the power-law RCE (Eq. 10) is basically incapable of describing the rheological behavior of polymer solutions and melts.
2000). Copyright 2000, The Society of Rheology. σ/R, where R is the effective cross-sectional radius. Since R >> a, the capillary pressure in the thread is much larger than that in the end regions. 15a. Denote, as before, the axial coordinate x, and the radial one y. From Eq. e. to the negative capillary pressure, where σ is the surface tension and a = a(t) is the cross-sectional radius. In a thin thread, the stress σyy is approximately equal to the value at the surface, and thus the second Eq.