Fundamentals and Applications of Micro and Nanofibers by Yarin A.L., Pourdeyhimi B., Ramakrishna S.

By Yarin A.L., Pourdeyhimi B., Ramakrishna S.

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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.

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