《Electron-Donating Effect Enabled Simultaneous Improvement on the Mechanical and Self-Healing Properties of Bromobutyl Rubber Ionomers》 was written by Zhang, Linjun; Wang, Hao; Zhu, Yong; Xiong, Hui; Wu, Qi; Gu, Shiyu; Liu, Xikui; Huang, Guangsu; Wu, Jinrong. Name: 4-Cyanopyridine And the article was included in ACS Applied Materials & Interfaces in 2020. The article conveys some information:
Due to the dynamic nature of networks and high mobility of mol. chains, self-healing elastomers are usually confronted with the trade-off between self-healing efficiency and mech. properties. Herein, a self-healing ionomer with both high mech. performance and high self-healing efficiency has been successfully developed by grafting bromobutyl rubber (BIIR) with pyridine-based derivatives Interestingly, the substituents on the pyridine ring can be used to regulate the interaction forces of ionic clusters and mol. dynamics. The electron-donating effect of the substituents facilitates stable π-π stacking between pyridyl ions, inducing the formation of regular and large ion aggregates, thereby improving the mech. strength of the ionomer. Meanwhile, the plasticizing effect of the substituents reduces the activation energy and relaxation temperature of the ionic aggregates, thus endowing the ionomer with a high self-healing efficiency. As a result, the ionomer shows tensile strength as high as 8.1 ± 0.3 MPa under room temperature and self-healing efficiency of 100 ± 3% at 60°C. Therefore, this strategy can be easily extended to other halogen-containing polymers, leading to a novel class of self-healing ionomers that hold great promise in diverse applications. In addition to this study using 4-Cyanopyridine, there are many other studies that have used 4-Cyanopyridine(cas: 100-48-1Name: 4-Cyanopyridine) was used in this study.
4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Name: 4-Cyanopyridine