MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
J Colloid Interface Sci. 2021 Apr 15;588:602-610. doi: 10.1016/j.jcis.2020.10.094. Epub 2020 Oct 27.
Nanoparticles reinforce rubbers and enhance Payne effect for the compounds experiencing large amplitude oscillatory shear deformation. Herein the effects of silica and cellulose nanocrystals on the Payne effect of natural rubber compounds are investigated by stress decomposition methods for clarifying the elastic and viscous nonlinearities varying with filler content and composition. The Payne effect is in general characterized by intercycle strain softening and shear thinning behaviors and intracycle hardening and thinning behaviors at high strain (strain rate) amplitudes while the filler influences the behaviors markedly at intermediate strain (rate) amplitudes. Especially, the addition of cellulose nanocrystals in the silica filled compounds improves the elastic nonlinearity and greatly weakens the viscous nonlinearity, providing a perspective on understanding the Payne effect for manufacturing high-performance rubber materials.
纳米粒子增强橡胶，并为经历大振幅振荡剪切变形的化合物增强 Payne 效应。在此，通过应力分解方法研究了二氧化硅和纤维素纳米晶对天然橡胶化合物 Payne 效应的影响，以阐明随填料含量和组成变化的弹性和粘性非线性。 Payne 效应通常的特征是在高应变（应变速率）幅值下的循环间应变软化和剪切变稀行为以及循环内应变硬化和变薄行为，而填料在中间应变（速率）幅值下显著影响这些行为。特别是，在二氧化硅填充的化合物中添加纤维素纳米晶可提高弹性非线性并大大减弱粘性非线性，为理解制造高性能橡胶材料的 Payne 效应提供了一个视角。
