Das Amit, Sallat Aladdin, Böhme Frank, Sarlin Essi, Vuorinen Jyrki, Vennemann Norbert, Heinrich Gert, Stöckelhuber Klaus Werner
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany.
Laboratory of Materials Science, Tampere University of Technology, P.O. Box 589, 33101 Tampere, Finland.
Polymers (Basel). 2018 Jan 19;10(1):94. doi: 10.3390/polym10010094.
In this work, we report about the mechanical relaxation characteristics of an intrinsically self-healable imidazole modified commercial rubber. This kind of self-healing rubber was prepared by melt mixing of 1-butyl imidazole with bromo-butyl rubber (bromine modified isoprene-isobutylene copolymer, BIIR). By this melt mixing process, the reactive allylic bromine of bromo-butyl rubber was converted into imidazole bromide salt. The resulting development of an ionic character to the polymer backbone leads to an ionic association of the groups which ultimately results to the formation of a network structure of the rubber chains. The modified BIIR thus behaves like a robust crosslinked rubber and shows unusual self-healing properties. The non-covalent reversible network has been studied in detail with respect to stress relaxation experiments, scanning electron microscopic and X-ray scattering.
在这项工作中，我们报告了一种本征自愈合咪唑改性商用橡胶的力学松弛特性。这种自愈合橡胶是通过将1-丁基咪唑与溴化丁基橡胶（溴化异戊二烯-异丁烯共聚物，BIIR）熔融共混制备的。通过这种熔融共混过程，溴化丁基橡胶的反应性烯丙基溴转化为咪唑溴盐。聚合物主链上离子特性的产生导致基团的离子缔合，最终形成橡胶链的网络结构。因此，改性后的BIIR表现得像一种坚固的交联橡胶，并具有非凡的自愈合性能。关于应力松弛实验、扫描电子显微镜和X射线散射，对这种非共价可逆网络进行了详细研究。
