SKM 2023 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 35: Poster Session II

CPP 35.26: Poster

Mittwoch, 29. März 2023, 11:00–13:00, P1

Intracrystalline dynamics of polybutylene succinate and poly(3-Hydroxybutyrate) — •Mohd Afiq Bin Anuar, Yu Qiang, Thomas Thurn-Albrecht, and Kay Saalwächter — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany

The dynamics behavior of polymers chain in crystal lamellae plays a critical role for its semicrystalline morphology [1, 2]. It is influenced by this intracrystalline dynamics (ICD) explaining the factors that limit its crystal thickness during isothermal crystallization. In this work, two different behaviours of semicrystalline polyesters, namely polybutylene succinate (PBS) and poly(3-Hydroxybutyrate) (P3HB), are discussed. A combination of nuclear magnetic resonance (NMR) techniques shows that isothermally crystallized PBS exhibit slow ICD longer than 1s which is similar to the reported crystal-fixed polymer, polycaprolactone [1]. Meanwhile, in P3HB crystal chain, the ICD with correlation jump motion around 0.5s/monomer at 120°C was detected. This is in contrast to previous reported [3] demonstrating a crystal-mobile behavior. Small-angle X-ray scattering measurement reveal that the P3HB crystal lamellae are significantly thicker than in PBS, confirming that P3HB and PBS can be classified as crystal-mobile and crystal-fixed, respectively. Details regarding morphology are shown in the poster.

References: [1] Schulz, M., et al., Macromolecules 2018, 51, 8377. [2] Schulz, M., et al., Nat. Common. 2022, 13, 1. [3] Xia, Z., et al., Soft Matter 2021, 17, 4195.