Super Strong and Tough Elastomers Enabled by Sacrificial Segregated Network  

作　　者：Yong Zhu Lai-Yun Wei Xuan Fu Jun-Qi Zhang Ling-Min Kong Guang-Su Huang Jin-Rong Wi 

机构地区：[1]State Key Laboratory of Polymer Materials Engineering,College of Polymer Science and Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Journal of Polymer Science》2021年第3期377-386,I0008,共11页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51673120)。

摘　　要：The integration of high strength and toughness concurrently is a vital requirement for elastomers from the perspective of long-term durability and reliability. Unfortunately, these properties are generally conflicting in artificial materials. In the present work, we propose a facile strategy to simultaneously toughen and strengthen elastomers by constructing 3 D segregated filler network via a simple latex mixing method.The as-fabricated elastomers are featured by a microscopic 3 D interconnected segregated network of rigid graphene oxide(GO) nanosheets and a continuous soft matrix of sulfur vulcanized natural rubber(NR). We demonstrate that the interconnected segregated filler network ruptures preferentially upon deformation, and thus is more efficient in energy dissipation than the dispersed filler network. Therefore, the segregated filler network exhibits better reinforcing effects for the rubber matrix. Moreover, the excellent energy dissipating ability also contributes to the outstanding crack growth resistance through the release of concentrated stress at the crack tip. As a result, the strength, toughness and fatigue resistance of the nanocomposites are concurrently enhanced. The methodology in this work is facile and universally applicable, which may provide new insights into the design of elastomers with both extraordinary static and dynamic mechanical performance for practical applications.

关 键 词：Elastomers NANOCOMPOSITES Segregated network Sacrificial bonds Mechanical properties 

分 类 号：TQ334[化学工程—橡胶工业]