On the physical behavior of Isotactic polypropylene fibers extruded at different draw-down ratios: II. structure and properties

Hassan M. El-Dessouky, Mohammad R. Mahmoudi, Carl A. Lawrence, Eric L.V. Lewis, Alison M. Voice, Ian M. Ward

Research output: Contribution to journalArticle

6 Citations (Scopus)


Microinterferometry (MIF), wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and an Instron tensile tester (ITT) were used to determine the correlation between optical and structural properties of polypropylene (PP) fibers. For the purpose of the study a set of as-spun isotactic PP fibers were extruded by melt spinning at different draw-down ratios (DDR). The birefringe00nce (δn), degrees of orientation, degree of crystallinity (χ), Young's modulus (Ee), and tenacity (T) were determined for PP fibers at the different DDR. An equiangular orientation of PP fibers at particular DDR was predicted experimentally, and the transverse modulus (Et) was estimated for the tested fibers. Empirical formulae were developed for correlating the fiber birefringence with some of the studied structural properties of PP fibers. POLYM. ENG. SCI., 50:200-208, 2010.
Original languageEnglish
Pages (from-to)200-208
Number of pages9
JournalPolymer Engineering and Science
Issue number1
Early online date30 Nov 2009
Publication statusPublished - Jan 2010
Externally publishedYes


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