Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session A04: Dynamic Polymer Networks I
8:00 AM–11:00 AM,
Monday, March 15, 2021
Sponsoring Units: DPOLY DSOFT
Chair: Svetlana Sukhishvili, Texas A&M University
Abstract: A04.00013 : Toward understandig the (scale-depending) dynamics in non-covalent polymer networks*
10:24 AM–11:00 AM
Ionomer elastomers that display intrinsic self-healing behaviour are investigated in order to earn deeper experimental insights into the interplay between molecular composition, bond strength, phase separation, and time-dependent rheological properties. We aim at understanding the underlying mechanisms, and at connecting the supramolecular bond lifetime to the network mobility and the self-restoring and scratch healing characteristics. We also demonstrate that by incorparation of magnetic nanoparticles to such elastomers it is possible to accelerate the healing process actively by use of magnetic fields.
Infomation on the local dynamics in non-covalent polymer networks is further made accessible by means of Magnetic Particle Nanorheology. Using model polymer solutions with well-established properties, the scale-dependent nanorheological properties can be accessed by making use of magntic nanoparticle of various size as mechanical probes. In dynamic polymer networks, the method allows to access detailed information on effective relaxation times on the molecular and particulate scale.
*We acknowledge funding from the German Research Society under grants DFG-SCHM1747-8 (SPP 1568 - Self-Healing Materials) and DFG-SCHM1747-10 (SPP 1681 - Particle-Matrix-Interactions).
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