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2 Polish Journal of Applied Chemistry

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DSC and waxs investigations of the polymorphous transition in isotactic polypropylene fibers during the thermal processes of drawing and texturing

100%

Fabia J. , Ślusarczyk C.

Polish Journal of Applied Chemistry

2009

tom Vol. 53, nr 2

129-134

The main goal of investigations presented in this paper was to determine the influence of the heat treatment of the partially oriented isotactic polypropylene (iPP) fibers on their supermolecular structure using differential scanning calorimetry (DSC) and wide angle x-ray scattering (WAXS) methods. In our calorimctric and diffraction studies we took an attempt to describe the transformation of the mesomorphic smectic phase of iPP POY fibers occurred under the influence of the heat treatment connected with the proccss of drawing and texturing.

Effect of clay content and parameters of spinning on polymer crystalline morphology in iPP/MMT composite fibers

80%

Ślusarczyk C. , Janicki J. , Fabia J.

Polish Journal of Applied Chemistry

2011

tom Vol. 55, nr 3-4

97-104

The structure of fibers formed during spinning is the result of the processes of orientation and crystallization occurring by solidifying the polymer stream. The addition of nanoclay particles into sheared polymer melts complicates the crystallization process and the morphology that subsequently forms. In this study, nanocomposite fibers of isotactic polypropylene and an organically modified montmorillonite, Cloisite 15A, were formed from the melt at different take-up velocity. The supermolecular structure of composite fibers was determined by means of X-ray methods (WAXS and SAXS). The intensity changes of the crystallinity peaks and montmorillonite peak in the composite fibers are discussed.