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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster II
CPP 46.19: Poster
Donnerstag, 12. März 2026, 09:30–11:30, P5
Crystallization behavior of electron beam modified Polylactide acid (PLA) — •Regine Boldt1, Elisabeth Hauschild1, Michael Müller1, and Markus Stommel1,2 — 1Leibniz Institut fuer Polymerforschung Dresden, Germany — 2Dresden University of Technology, Germany
Polylactic acid (PLA) is a polymer synthesized from renewable raw materials. The properties of PLA are essentially determined by its chemical/physical structure, such as molar mass, molar mass distribution, D-isomer content, and the resulting morphology. The morphology can be influenced by modifying the molecular structure on the one hand, and by the process parameters during processing on the other. Since PLA crystallizes very slowly, high cooling rates, which occur in processing methods such as injection molding, usually result in amorphous components. In this work, we modified PLA using high-energy electrons in order to accelerate its crystallization without adding external additives. The resulting changes in crystallization kinetics were analyzed and correlated with the morphology after irradiation. The spherulite growth rates were determined quantitatively using hot stage experiments on a light microscope. The results show that electron-modified PLA exhibits substantially increased crystal growth rates, enabling significant reductions in cooling time during processing operations such as injection molding.
Keywords: Polylacid; electron-beam modification; crystallization