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Updated: Jul 14, 2026

Improving High Viscosity Extrusion of Microcrystals for Time-resolved Serial Femtosecond Crystallography at X-ray Lasers
Published on: February 28, 2019
Melt spinning of bacterial aliphatic polyester using reactive extrusion for improvement of crystallization
Roland Vogel1, Bernhard Tändler, Dieter Voigt
1Leibniz Institute of Polymer Research Dresden, 01005 Dresden, PO Box 120411, Germany. vogel@ipfdd.de
Abstract:
This paper reports on an attempt to use reactive extrusion with peroxide as a comfortable pathway for improvement of the crystallization of poly(3-hydroxybutyrate) in a melt spinning process. At first, rheological and thermal properties of the modified melts are determined in order to assess the effect of nucleation. Then spinning tests are carried out. Molecular weights and molecular weight distributions of the spun fibers are determined by chromatographic methods. Average crystallite size is measured by wide angle X-ray scattering. Thermal and textile properties of the spun PHB fibers are also determined. An estimation of the improvement of the crystallization in the spinline and of the inhibition of the secondary crystallization in the fibers from the use of the described way of reactive extrusion is given.
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