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Revealing the supramolecular nature of side-chain terpyridine-functionalized polymer networks.

Brassinne J, Jochum FD, Fustin CA, Gohy JF - Int J Mol Sci (2015)

Bottom Line: Nowadays, finely controlling the mechanical properties of polymeric materials is possible by incorporating supramolecular motifs into their architecture.In this context, the synthesis of a side-chain terpyridine-functionalized poly(2-(dimethylamino)ethyl methacrylate) is reported via reversible addition-fragmentation chain transfer polymerization.In addition, the complex phenomena occurring under large oscillatory shear are interpreted in the context of transient networks.

View Article: PubMed Central - PubMed

Affiliation: Institute of Condensed Matter and Nanosciences (IMCN), Bio- and Soft Matter (BSMA) Division, Université catholique de Louvain (UCL), Place L. Pasteur 1, Louvain-la-Neuve B-1348, Belgium. jeremy.brassinne@uclouvain.be.

ABSTRACT
Nowadays, finely controlling the mechanical properties of polymeric materials is possible by incorporating supramolecular motifs into their architecture. In this context, the synthesis of a side-chain terpyridine-functionalized poly(2-(dimethylamino)ethyl methacrylate) is reported via reversible addition-fragmentation chain transfer polymerization. By addition of transition metal ions, concentrated aqueous solutions of this polymer turn into metallo-supramolecular hydrogels whose dynamic mechanical properties are investigated by rotational rheometry. Hence, the possibility for the material to relax mechanical constrains via dissociation of transient cross-links is brought into light. In addition, the complex phenomena occurring under large oscillatory shear are interpreted in the context of transient networks.

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Pictures of metallo-supramolecular hydrogels obtained from a P(DMAMEA200-co-TpyMA4.5) copolymer solution upon the addition of cobalt(II) ions.
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ijms-16-00990-f005: Pictures of metallo-supramolecular hydrogels obtained from a P(DMAMEA200-co-TpyMA4.5) copolymer solution upon the addition of cobalt(II) ions.

Mentions: In practice, the formation of a percolated network structure was firstly evidenced by the inverted-tube test. As illustrated by Figure 5, the initially free-flowing concentrated polymer solutions indeed turned into free-standing supramolecular gels upon the addition of metal ions. Additionally, the hypothetical formation of metal-terpyridine bis-complexes between polymer chains was strongly supported by the color change arising from the addition of cobalt (II) ions as their chloride salt, which gives orange-brown color.


Revealing the supramolecular nature of side-chain terpyridine-functionalized polymer networks.

Brassinne J, Jochum FD, Fustin CA, Gohy JF - Int J Mol Sci (2015)

Pictures of metallo-supramolecular hydrogels obtained from a P(DMAMEA200-co-TpyMA4.5) copolymer solution upon the addition of cobalt(II) ions.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4307286&req=5

ijms-16-00990-f005: Pictures of metallo-supramolecular hydrogels obtained from a P(DMAMEA200-co-TpyMA4.5) copolymer solution upon the addition of cobalt(II) ions.
Mentions: In practice, the formation of a percolated network structure was firstly evidenced by the inverted-tube test. As illustrated by Figure 5, the initially free-flowing concentrated polymer solutions indeed turned into free-standing supramolecular gels upon the addition of metal ions. Additionally, the hypothetical formation of metal-terpyridine bis-complexes between polymer chains was strongly supported by the color change arising from the addition of cobalt (II) ions as their chloride salt, which gives orange-brown color.

Bottom Line: Nowadays, finely controlling the mechanical properties of polymeric materials is possible by incorporating supramolecular motifs into their architecture.In this context, the synthesis of a side-chain terpyridine-functionalized poly(2-(dimethylamino)ethyl methacrylate) is reported via reversible addition-fragmentation chain transfer polymerization.In addition, the complex phenomena occurring under large oscillatory shear are interpreted in the context of transient networks.

View Article: PubMed Central - PubMed

Affiliation: Institute of Condensed Matter and Nanosciences (IMCN), Bio- and Soft Matter (BSMA) Division, Université catholique de Louvain (UCL), Place L. Pasteur 1, Louvain-la-Neuve B-1348, Belgium. jeremy.brassinne@uclouvain.be.

ABSTRACT
Nowadays, finely controlling the mechanical properties of polymeric materials is possible by incorporating supramolecular motifs into their architecture. In this context, the synthesis of a side-chain terpyridine-functionalized poly(2-(dimethylamino)ethyl methacrylate) is reported via reversible addition-fragmentation chain transfer polymerization. By addition of transition metal ions, concentrated aqueous solutions of this polymer turn into metallo-supramolecular hydrogels whose dynamic mechanical properties are investigated by rotational rheometry. Hence, the possibility for the material to relax mechanical constrains via dissociation of transient cross-links is brought into light. In addition, the complex phenomena occurring under large oscillatory shear are interpreted in the context of transient networks.

Show MeSH
Related in: MedlinePlus