Berlin 2024 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 3: Crystallization, Nucleation and Self-Assembly I

CPP 3.1: Hauptvortrag

Montag, 18. März 2024, 09:30–10:00, H 0110

Flexibility, connectivity, and topological constraints in polymer crystallization — •Toshikazu Miyoshi — The University of Akron, School of Polymer Science and Polymer Engineering, Akron, OH, United States

Since Keller's finding of single crystals in 1957, numerous research has been conducted in experimental, theoretical, and computational aspects in polymer crystallization. The accumulated experimental results have been used to develop polymer crystallization theories as well as have gradually shifts researchers' primary interest from the crystalline structure itself to the crystal-amorphous interface and amorphous structure. Connectivity, flexibility, and topological constraint are important structures to distinguish the uniqueness of long polymer chains from small organic molecules as well as large biomacromolecules, proteins. Chain-folding structure of semicrystalline polymer is one of key structures to reflect flexibility, connectivity, and topological constraint during crystallization. In this talk, the PI will present the impacts of flexibility, connectivity, and topological constraint on the chain-folding structure of semicrystalline polymers during crystallization. The molecular level structure is used to understand the crystallization mechanisms in a dilute solution as well as in a highly condensed melt.

Keywords: flexibility; connectivity; topological constraint; polymer crystallization; solid state nmr