Exploring the unique characteristics of natural rubber induced by coordination interaction between proteins and Zn2+. (10th April 2020)

• Record Type: Journal Article
• Authors: Wei, Yan-Chan; Liu, Gui-Xiang; Zhang, Ling; Zhao, Fuchun; Liao, Shuangquan; Luo, Ming-Chao
• Is Part Of: Polymer. Volume 193(2020)
• Publication Date: 2020-04-10
• Subjects: Natural rubber -- Non-rubber components -- Coordination interaction; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2020.122357
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: The properties of synthetic polyisoprene (PI) cannot rival that of NR, although synthetic PI can achieve similar molecular chain structure (for example molecular weight and molecule chain configuration) to that of NR. It is still a challenge to explore the reason why NR owns superior comprehensive properties. Here our group focuses on the problem why non-rubber components can accelerate crosslinking process from molecular level. From macroscopic perspective, we find that proteins change the crosslinking behaviors and decrease activation energy of crosslinking process. From microscopic perspective, the formation of coordination interaction between Zn 2+ and amide bonds of proteins is confirmed, which improves solubility of Zn 2+ in matrix and further contributes to crosslinking reaction. In this study, the formation of coordination interaction between proteins and Zn 2+ is considered as one of the reasons why NR owns excellent mechanical properties. This article also provides more insightful understanding toward the relationship among structure, components, and properties of NR. Graphical abstract: Image 1 Highlights: Proteins change the crosslinking behaviors and decrease activation energy of crosslinking process. The formation of coordination interaction between Zn 2+ and amide bonds of proteins is confirmed. Such coordination interaction improves solubility of Zn 2+ in matrix and further contributes to crosslinking reaction.