Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 73: Functional Polymer Hybrids and Composites
CPP 73.6: Vortrag
Donnerstag, 15. März 2018, 16:15–16:30, PC 203
Photodegradation Evaluation in PVC Films and Resonance Raman Spectroscopic Insights into the Patterns of UV Light-Induced Polyene Defects — •Patrice Donfack1, Elena A. Sagitova2, Gulnara Yu. Nikolaeva2, Alexandra Costa3, Simon J. Shilton3, Dmitry I. Mendeleyev4, Kirill A. Prokhorov2, and Arnulf Materny1 — 1Jacobs University, Bremen, Germany — 2A.M. Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia — 3University of Strathclyde, Glasgow, Scotland, UK — 4A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Moscow, Russia
Polyvinylchloride (PVC) is among the most popular components in modern industrial composite polymer materials, whose structure can be purposefully tuned within a wide range to feature new interesting physical and chemical properties. Typical application-relevant properties of PVC-based materials are affected by the formation of conjugated double bond defects (polyene) as the result of e.g. mechanical, thermal, chemical, or optical factors. In the present contribution, the PVC structure and especially the UV irradiation-induced polyene formation in the PVC matrix are studied using a combination of several techniques, including resonance Raman spectroscopy. The latter has proven very powerful in providing structural insights in both the small crystalline and the predominantly amorphous phases in PVC. Our results uncover the size distribution and content of polyene defects in a photodegraded PVC matrix as a function of UV-irradiation doses, yielding important information relevant for PVC-based insulating materials.