부산대학교 도서관

Requirements for the material with high tensile strength and elongation at break are proposed with the development of soft and stretchable electronics. The nitrile butadiene rubber (NBR) crosslinked by coordination bonds has excellent tensile properties and is expected to be used in the flexible electronics field, but the effect of strain rate on tensile properties of crosslinked NBR needs to be further analyzed. In this work, the NBR with dual crosslinked networks was prepared by methods of double ligands crosslinking, covalence-coordination crosslinking, and bimetallic coordination crosslinking. Furthermore, the strain rate sensitivity of tensile properties of NBR with dual crosslinked networks was studied by considering the strain rate as a variable. The results indicated that the strength of the coordination bonds formed by the second ligand had significant effects on the tensile properties of NBR: The coordination bonds with low strength could protect the integrity of the crosslinked network, but the tensile properties of NBR with two different kinds of strong coordination bonds would be more dependent on the strain rate. In covalence-coordination crosslinked or bimetallic crosslinked NBR, the synergy between the two crosslinked networks could not only increase the strength and elongation at break of NBR but also reduce the influence of strain rate on the tensile properties of NBR. [ABSTRACT FROM AUTHOR]