Dresden 2006 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 3: Polymer Materials

CPP 3.3: Vortrag

Montag, 27. März 2006, 10:30–10:45, ZEU 114

Strain dependent structural changes of spider dragline silk observed with single fiber x-ray diffraction — •Anja Glisovic¹, Thorsten Vehoff¹, Richard Davies², Christian Riekel², and Tim Salditt¹ — ¹Institut für Röntgenphysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany — ²ESRF, 6 rue Jules Horowitz, BP220, 38043 GRENOBLE CEDEX, FRANCE

Spider silk is a biopolymer which has attracted more and more attention in recent years due to its unique combination of tensile strength and viscoelastic extensibility. In order to study the correlation between structure and mechanical properties we combined stress-strain measurements on single dragline fibers with x-ray diffraction. The experiments were carried out at ESRF’s microfocus beamline ID 13 in Grenoble. With this method the structural changes of the fiber’s crystalline parts could be studied. The changes of the crystallites are quite small and their contribution to the mechanical properties is discussed.