Regensburg 2025 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: Emerging Topics in Chemical and Polymer Physics, New Instruments and Methods I
CPP 30.7: Talk
Wednesday, March 19, 2025, 18:00–18:15, H34
Real-time structure-transport investigation under mechanical strain in flexible carbon-based conductive polymer nanocomposites — •Sarathlal Koyiloth Vayalil1,2, Vaishnav B2, Benedikt Sochor1, Stephan V. Roth1,3, Ajay Gupta2, Tobias Kraus4,5, and Debmalya Roy6 — 1Deutsches Elektronen-Synchrotron DESY, 22607, Hamburg, Germany — 2Department of Physics, Applied Science cluster, UPES, Dehradun 248007, India — 3Division of Coating Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden — 4INM Leibniz-Institute for New Materials, 66123 Saarbruecken, Germany — 5Colloid and Interface Chemistry, Saarland University, 66123 Saarbruecken, Germany — 6DMSRDE, Kanpur 208013, India
In this work, an in situ ultra-small angle X-ray scattering combined with electrical transport measurements under mechanical strain has been carried out in flexible, conductive carbon polymer nanocomposite to observe the real-time structural variations in nanofiller morphologies and distribution. For this purpose, the non-polar and polar elastomers viz. polydimethylsiloxane and polyurethane respectively, loaded with 0D Carbon black, 1D Carbon nanotubes, and 2D Graphene has been employed. The study has elucidated that, it is the filler′s fractal dimension that varies rather than aggregate distribution upon stress that decides PNC′s electrical conduction. Further, a novel relationship has been established between fractal dimension and composite′s conductivity, which invincibly guides in designing wearable and flexible conductors.
Keywords: Small-angle X-ray scattering; Flexible polymer nanocomposites; Electrical transport; Graphene; Mechanical strain