Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session 2
CPP 37.56: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P3
Influence of the Crystallization Kinetics on the Morphology and Mechanical Properties of Poly-є-Caprolactone — •Anne Seidlitz1, Yongfeng Men2, and Thomas Thurn-Albrecht1 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Germany — 2State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, China
When a sample is crystallized under isothermal conditions, the crystallization process can be slow (slow regime) or fast (fast regime) compared to the dynamics of the chains in the melt. In the slow regime the chains in the melt should be able to disentangle during crystallization, whereas in the fast regime the chains have no time to dissolve the entanglements. We investigated the influence of the crystallization regime on the morphology and mechanical properties of PCL. We performed tensile measurements in combination with SAXS experiments to investigate the structure and nonlinear mechanical properties. Samples with different molecular weights were isothermally crystallized at different temperatures to reach both regimes. While the morphology is nearly unaffected by the crystallization temperature, we observe a systematic change in the tensile properties, probably caused by a difference in entanglement density between the two crystallization regimes.