Crystallization is common features in small and large molecules. In small organic molecules and proteins, crystallization induces intermolecular packing. In the case of long polymeric chains, crystallization induces more or less folding at the interface and thus result in intramolecular packing structure as well as intermolecular one. Two different types of packing structure induce complexity and uniqueness of polymer crystals. <i>How can we distinguish intramolecular interaction from intermolecular one in polymers?</i> This fundamental question arises in most polymer researches. However, we do not have sufficient information about intramolecular and intermolecular interactions. In this talk, I will present our idea to solve this interesting and nasty question in polymer science by using solid-state NMR. Several examples of i) crystal packing ii) chain-folding structure, iii) deformation, iv) chemical reactions will be addressed.

Intramolecular and intermolecular interactions in semicrystalline polymers

2019 Fall National Meeting

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