文章摘要
Effect of Modified Aramid Short Fiber and Sodium Polyacrylate on Properties of NBR Water Swelling Rubber
Received:May 29, 2018  Revised:May 29, 2018
DOI：10.12136/j.issn.1000-890X.2019.02.0111
Key Words: water swelling rubber；NBR；aramid short fiber；phosphoric acid modification；sodium polyacrylate；water swelling rate
Author NameAffiliationE-mail
XU Ensong School of Materials Science and Engineering,Wuhan Institute of Technology 412531790@qq.com 
YANG Jun* School of Materials Science and Engineering,Wuhan Institute of Technology yang6362@wit.edu.cn 
FAN Zhiwei School of Materials Science and Engineering,Wuhan Institute of Technology  
ZHAO Qitian School of Materials Science and Engineering,Wuhan Institute of Technology  
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Abstract:
      Aramid short fiber was modified by phosphoric acid etching，nitrile-butadiene rubber（NBR） water swelling rubber was prepared by adding modified aramid short fiber as reinforcing filler into the NBR compound with 20 phr carbon black and 20 phr silica. The effects of the addition levels of sodium polyacrylate (water absorbent resin) and modified aramid short fiber on the physical properties and water absorption of NBR water swelling rubber were studied. The results showed that，the addition level of sodium polyacrylate had great influence on the tensile strength，elongation at break，water swelling rate and mass loss rate of NBR water swelling rubber. The suitable addition level of sodium polyacrylate was 60 phr. The hardness and tensile strength of NBR water swelling rubber increased as the addition level of modified aramid short fiber increasing，and meanwhile the water swelling rate and mass loss rate of NBR water swelling rubber decreased. The suitable addition level of modified aramid short fiber was 4 phr.
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