Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2019 Nov;31(44):e1904029. doi: 10.1002/adma.201904029. Epub 2019 Sep 6.
Superstretchable materials have many applications in advanced technological fields but are difficult to stretch to more than 1000× their original length. A superstretchable dynamic polymer network that can be stretched to 13 000× its original length is designed. It is revealed that superstretchability of the polymer network is derived from the synergistic effect of two different types of dynamic bonds, including a small number of strong dynamic imine bonds to maintain the network integrity during stretching and a large number of weak ionic hydrogen bonds to dissipate energy. This approach provides new insights into the design of superstretchable polymers.
超拉伸材料在先进技术领域有许多应用，但很难将其拉伸到原始长度的 1000 倍以上。设计了一种可拉伸至原始长度 13000 倍的超拉伸动态聚合物网络。研究表明，聚合物网络的超拉伸性源于两种不同类型的动态键的协同作用，包括少量强动态亚胺键以在拉伸过程中保持网络完整性，以及大量弱离子氢键以耗散能量。这种方法为超拉伸聚合物的设计提供了新的见解。
