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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 98: Composites and Functional Polymer Hybrids

CPP 98.2: Vortrag

Donnerstag, 19. März 2020, 15:15–15:30, ZEU 114

Self-Structuring formation of filler particles in low concentration magnetoactive polymers — •Dirk Sindersberger, Nina Prem, and Gareth Monkman — OTH Regensburg, Regensburg, Deutschland

The formation of micro-structures in magnetoactive polymers (MAP) is a recently discovered phenomenon found only with very low filler particle concentrations (less than 3 wt%). Due to the degassing process, filler particles collect around an ascending bubble, which dissolves at a certain point leaving particulate rings within the matrix. The formation of toroidal micro-structures commences as filler concentration approaches 1wt%. The development of coherent parallel aligned rings with a compact order continues as particle concentrations increase toward 2 wt%. Between 2 and 3 wt% capillary doublets develop, while mass percentages higher than 3 wt% results in increasing entropy as the random order of particle agglomeration found in higher concentration MAP dominates. Self-structured samples of different filler material and concentrations between 1 and 3 wt% have been investigated using X-Ray tomography, where the emerging structures can be observed and visualized. Additionally, this work utilizes a range of spectroscopic analysis methods (UV/VIS and FTIR) and their applicability to MAP characterization at wavelengths ranging from 200 nm to 25 μm.