文章摘要
混炼胶熔体的挤出膨胀研究
Die Swell of Melted Compound in Extrusion
  
DOI：
中文关键词: 混炼胶  拉伸流变  应力松弛  挤出膨胀
英文关键词: compound  tension theology  stress relaxation  die swell
基金项目:
作者单位
赵良知 华南理工大学 
唐国俊 华南理工大学 
郑融 华南理工大学 
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中文摘要:
      依据粘弹性熔体流变学理论，采用张量分析方法，研究了混炼胶熔体在挤出过程中的膨胀行为。推导出以剪切形变为主，挤出物膨胀率B=√3[(l+S2R)4/3一l]l/2/2SR；以拉伸形变为主，挤出物膨胀率B2=3(l+K2S2R)l/3—6(1+K2S2R)-2/3/7。在理论上进一步论证收敛拉伸流变是导致混炼胶熔体挤出物膨胀率较大的原因。
英文摘要:
      Based on the theological theory of viscoelastic melt，a study was made of the dieswell of the melted compound in extrusion using tension analysis.The extrudate swell equations were derived：B=√3[(l+S2R)4/3一l]l/2/2SR(L/D→∞)， B2=3(l+K2S2R)l/3—6(1+K2S2R)-2/3/7(L/D→0).It was confirmed theoretically that the convergent tension theology was the main mechanism resulting in the higher die swell.
Author NameAffiliation
Zhao Liangzhi South China University of Science and Technology 
Tang Guojun South China University of Science and Technology 
Zheng Rong South China University of Science and Technology 
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