文章摘要
Effect of MWCNTs Amounts on Extrusion Rheological Properties of NR/BR Blends
Received:April 23, 2023  Revised:April 23, 2023
DOI：10.12136/j.issn.1000-890X.2025.04.0261
Key Words: MWCNTs；rheological property；extrusion swelling；surface morphology
Author NameAffiliationE-mail
YAO Huidan 青岛科技大学 橡塑材料与工程教育部重点实验室 1871794761@qq.com 
Du Zhongjin 青岛科技大学 橡塑材料与工程教育部重点实验室  
DU　Yu 青岛科技大学 橡塑材料与工程教育部重点实验室  
ZHAO Hongying* 青岛科技大学 橡塑材料与工程教育部重点实验室
青岛科技大学 中德科技学院 		hongying.zhao@qust.edu.cn 
SUN　Chong 青岛科技大学 橡塑材料与工程教育部重点实验室  
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Abstract:
      The natural rubber/butadiene rubber blends were filled with multi walled carbon nanotubes（MWCNTs）/carbon black N330，the effect of the MWCNTs amounts on the extrusion rheological properties of the blends was studied.The results showed that as the MWCNTs amounts increased，the Mooney viscosity of the blend increased，and the stress relaxation rate decreased.As the shear rate increased，the steady viscosity of the blend（melt） decreased，the shear stress approximately increased linearly，the extrusion swelling ratio and the distortion degree of the extrudate increased.When the shear rate was fixed，as the MWCNTs amount increased，the extrusion swelling ratio of the blend decreased.When the shear rate was 50 s-1，the MWCNTs amounts had little effect on the surface morphologies of the extrudate of the blends.When the shear rate was 200 s-1，the surface of the extrudate of the blend with 7 phr MWCNTs exhibited twisted state.When the shear rate reached 500 s-1，the surfaces of the extrudate of the blend with different MWCNTs amounts showed twisted states.
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