Regensburg 2022 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 2: Polymer Networks and Elastomers

CPP 2.4: Talk

Monday, September 5, 2022, 10:15–10:30, H39

Correlations of infrared spectroscopy and DSC measurements to determine the yield of scission under irradiation in biopolyesters — •David Krieg, Mirko Rennert, and Michael Nase — Institut für Biopoylmerforschung der Hochschule für Angewandte Wissenschaften Hof

Under the influence of ionizing irradiation, biopolyesters can either undergo crosslinking or scissioning. It was shown that the yield of corsslinking for polyesters such as polybutylenadipat-terephthalat (PBAT) can be correlated to changes in peaks in the IR spectrum and the onset time of the melting peak while heating during DSC measurements using the Avrami equation [Kijchavengkul 2008]. For biopolyesters such as polyhydroxybutyrate (PHB) and polylactic acid (PLA) sicsioning is the dominant process under irradiation. This talk will go into detail, whether similar correlations as seen in crosslinking PBAT can be found in PLA and PH3B, when scission is the dominate reaction and what structural changes in the polymer make this correlation possible.