Author:
Yang Li,Shi Xuanyu,Sun Shihao,Zhong Jun,Yu Xiaofeng,Wang Danling,Song Yihu,Zuo Min,Zheng Qiang
Abstract
The evolution of the morphology/structure and the nonlinear viscoelasticity of rubber blends under large amounts of strain are key scientific issues for the design and manufacture of rubber blends. The rheological responses of natural rubber/styrene-butadiene rubber (NR/SBR) blends are traced over a wide range of blend compositions to gain an insight into the effect of blend morphology on their nonlinear viscoelasticity. We also prepare NR + SBR physical blends without melt mixing to distinguish the contributions of composition and blend morphology to the viscoelastic response. The microscopic heterogeneous gel-like structure of NR/SBR blends may remarkably weaken their strain softening and improve their modulus hysteretic recovery under large strain, which may be attributed to the heterogeneous microscopic deformation for the NR and SBR phases. Furthermore, additional elastic contribution resulted from the increasing interfacial energy of domain deformation. This may provide some new insights into the effect of blend morphology on the Payne effect of rubber blends.
Funder
the National Natural Science Foundation of China
Subject
Polymers and Plastics,Organic Chemistry,Biomaterials,Bioengineering
Cited by
1 articles.
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