Synthesis of New Thermoplastic Elastomers by Silver Nanoparticles as Cross-Linker

Abstract

A novel type of elastomers with silver nanoparticles (AgNP) as cross-linkers has been obtained by a quantitative one-phase bottom-up procedure based on α,ω-dimercapto-poly(cis-1,4-isoprene) (PIP). This telechelic polymer with high cis-content of >80% and near-quantitative functionalization degree has been synthesized in a one-pot procedure by anionic polymerization. It was cross-linked by coordination of the thiol groups to in-situ synthesized AgNP to yield a repeatedly melt-processable elastomer. It was found that the E-modulus increased up to an ideal ratio of AgNP to PIP and decreases drastically with AgNP oversaturation due to decreasing cross-linking density. Swelling experiments were in agreement with these results. The cross-linking of telechelic polymers with metal nanoparticles has been applied to other metals and polymers, leading to cross-linked materials in all cases. Antibacterial properties of the silver-containing elastomers were found by the Kirby–Bauer test.

Functional Iron Oxide Nanoparticles as Reversible Crosslinks for Magnetically Addressable Shape‐Memory Polymers

“…The reversible nature of the bonds between the stabilizing ligands and the nanoparticles permits, in principle, the melt‐processing of such network structures, although it is acknowledged that this scheme has yet to be optimized. This feature was recently observed by Greiner and co‐workers for polymers with a similar architecture (i.e., elastomers based on poly( cis ‐1,4‐isoprene) and silver nanoparticles as crosslinkers). While the latter materials were prepared by in situ synthesis of the nanoparticles in the presence of a polymeric surfactant, the present synthesis approach follows an orthogonal approach, which should be more easily adaptable to other nanoparticles and polymers.…”

Synthesis and Properties of Networks Based on Thiol‐ene Chemistry Using a CO2‐Based δ‐Lactone

“…Thioethers have good metal complexation ability, and many researchers have utilized the merit to construct elastomers, chelating resins, self‐healable materials, and nanoparticles . Thioether is an intrinsic part of TEN, and we investigated the complexation properties of the networks with Cu 2+ , Ni 2+ , Fe 3+ , and Co 2+ .…”

Makromolekulare Chemie 2011

“…Bei Metall‐Polymer‐Hybridmaterialien zeigten Agarwal et al, wie thermoplastische Elastomere auf Basis von a,x‐dimercapto‐Poly(cis‐1,4‐isopren) mit in‐situ‐synthetisierten Silbernanopartikeln herstellbar sind 31. Dieses Konzept kann über längere Sicht einen Transfer auf andere Metall‐ und Metalloxid‐Nanopartikel sowie andere Polymere erlauben.…”