Tuning polymer properties of non-covalent crosslinked PDMS by varying supramolecular interaction strength
Literature Information
Publication Date
2020-03-25
DOI
10.1039/D0PY00139B
Impact Factor
5.582
Authors
Brigitte A. G. Lamers, Marcin L. Ślęczkowski, Fabian Wouters, Tom A. P. Engels, E. W. Meijer, Anja R. A. Palmans
View Original
Abstract
Non-covalently crosslinked polymeric networks are promising materials towards sustainable and recyclable plastics. Here, we present the post-functionalization of poly(dimethyl siloxane) (PDMS) with supramolecular moieties, attached as grafts to the PDMS backbone, to obtain recyclable PDMS networks. We select three different supramolecular motifs that differ in interaction strength and investigate how these differences affect the dynamic behavior of the networks. The introduction of dinitrohydrazones (hydz), which afford weak supramolecular interactions by π-stacking, resulted in a viscous material at room temperature. Stronger self-association was achieved by the introduction of benzene-1,3,5-carboxamides (BTAs) and ureidopyrimidinones (UPys), which self-assemble via triple and quadruple hydrogen bonding, respectively. This resulted in a thermoplastic elastomeric material for BTA-based PDMS and brittle materials for Upy-based PDMS. Time- and temperature-dependent mechanical measurements reveal that the dynamic nature of the supramolecular bonds becomes slower upon increasing the interaction strength. The polymers are fully recyclable by solvation or compression molding without the loss of material properties. Thereby, by using one linear PDMS backbone, we demonstrate how fundamentally different material properties are obtained by changing the supramolecular interaction strength and type of non-covalent crosslinks. These molecular insights broaden the scope and application of PDMS-based sustainable materials.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
7.3%
Articles per Year:
457
Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.
Recommended Compounds
-1,2-cyclohexanediamine structure](https://static.chemtradehub.com/structs/928/928769-12-4-a4f0.webp "N,N'-Bis[3-(2-methoxyphenyl)-2-hydroxybenzyl](1R,2R)-1,2-cyclohexanediamine structure")
N,N'-Bis[3-(2-methoxyphenyl)-2-hydroxybenzyl](1R,2R)-1,2-cyclohexanediamine
CAS Number:
928769-12-4
Molecular Formula:
C34H38N2O4
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