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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: Vortrag

Mittwoch, 19. März 2025, 18:00–18:15, H34

Real-time structure-transport investigation under mechanical strain in flexible carbon-based conductive polymer nanocomposites — •Sarathlal Koyiloth Vayalil^1,2, Vaishnav B², Benedikt Sochor¹, Stephan V. Roth^1,3, Ajay Gupta², Tobias Kraus^4,5, 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