Quantification of Triple‐Shape Memory Behavior of Polymers Utilizing Tension and Torsion. Issue 9 (4th May 2021)

• Record Type: Journal Article
• Authors: Meurer, Josefine; Rodriguez Agudo, José Alberto; Zechel, Stefan; Hager, Martin D.; Schubert, Ulrich S.
• Is Part Of: Macromolecular chemistry and physics. Volume 222:Issue 9(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-05-04
• Subjects: quantification of shape‐memory -- rheology -- shape‐memory polymers -- thermo‐mechanical analysis -- triple‐shape‐memory; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.202000462
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract: Shape‐memory polymers (SMPs) are well investigated smart materials. With their ability to memorize their original shape they are interesting candidates for a large range of applications. Certain SMPs feature triple shape‐memory behavior. In these cases, it is possible to fix two different temporary shapes. However, the exact quantification of the individual steps regarding their programming and recovery rate is difficult and has not been possible so far. In this work, a novel approach for the analysis and exact quantification of triple SMPs is presented. By applying a customized rheology protocol, it is possible to perform and to analyze torsional and tensional experiments simultaneously. Consequently, different shapes in different directions (vertical and horizontal) can be fixed and the individual steps can be investigated independently at different switching temperatures. Abstract : A new method for the quantification of triple‐shape memory behavior of polymers is presented. For this purpose, twisting and elongation are studied separately from each other enabling the investigation of each recovery step without the interference of the other one. Thus, realistic values for the triple‐shape memory behavior are obtained.