Role of lysine amino acid in zinc‐based ionic thermoplastic elastomer: Dosage‐properties correlation study

Abstract

Ionic thermoplastic elastomer (TPE) materials have substantial scientific and commercial value due to their recyclable nature and wide adaptive applications. This article presents experimental results and analysis on the effects of the addition of “zwitterionic component” on various properties of maleic anhydride–grafted ethylene–propylene (M‐EPM)–based ionic TPEs. For this purpose, L‐lysine amino acid has been used, which contains a zwitterionic group and a primary amine group. The present work aims to understand how zwitterionic compounds can influence the behavior of the typical ionic TPEs. In this work, a reference ionic TPE sample and different test batches were prepared by varying the dosage of lysine amino acid in the rubber compound. Samples were easily prepared by using conventional rubber processing equipment, such as an internal mixer, two‐roll mill, and hydraulic press. Mechanical and other physical properties were investigated to examine the ionic cluster formation assisted by lysine amino acid. Adverse and favorable aspects of using lysine amino acid in zinc‐based M‐EPM ionic TPE have been discussed comprehensively.

Biologically Derived Metal–Cysteine Coordination Complexes Crosslink Carboxylated Nitrile Rubber and Enable Room Temperature Self-Healing, Stretchability, and Recyclability

“…There are not many studies on this subject that emphasize the biologically derived and industrially used materials. 51 Herein, we have developed a novel technique that advantages adaptability in synthesizing a reactive metal−amino complex (Zn/Ni-cysteine complexes), which can use as a coordination crosslinking agent in rubber materials. In comparison to the pure L-cysteine-cured product, the naturally occurring metal− cysteine coordination complexes crosslinking XNBR rubber displayed excellent stretchability, good robustness, recyclability, and outstanding self-healing performance at room temperature for 24 h. This investigation contrasts physical crosslinking (metal−ligand networks) and covalent interaction (disulfide linkage), as well as the impact of room temperature self-healing efficiency, 52,53 stretchability, recyclability, and mechanical characteristics of rubbery materials.…”

“…However, there is literature on developing rubber’s mechanical qualities, reversibility, and self-healing capabilities. There are not many studies on this subject that emphasize the biologically derived and industrially used materials . Herein, we have developed a novel technique that advantages adaptability in synthesizing a reactive metal–amino complex (Zn/Ni-cysteine complexes), which can use as a coordination crosslinking agent in rubber materials.…”