Effects of fiber length distribution on flow property and internal microstructure of an injection molded part

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• 作者：Soon Hyoung Hwang ; Doo Jin Lee ; Hye Rim Youn ; Young Seok Song…
• 关键词：micro ; CT ; fiber length distribution ; flowability ; numerical analysis
• 刊名：Macromolecular Research
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：23
• 期：9
• 页码：844-849
• 全文大小：686 KB
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• 作者单位：Soon Hyoung Hwang (1)
  Doo Jin Lee (1)
  Hye Rim Youn (1)
  Young Seok Song (2)
  Jae Ryoun Youn (1)
  
  1. Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Daehak-Dong, Gwanak-Gu, Seoul, 151-744, Korea
  2. Department of Fiber System Engineering, Dankook University, Gyeonggi, 448-701, Korea
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Polymer Sciences
  Characterization and Evaluation of Materials
  Soft and Granular Matter, Complex Fluids and Microfluidics
  Nanochemistry
  Nanotec
  
• 出版者：The Polymer Society of Korea, co-published with Springer
• ISSN：2092-7673

文摘

Internal microstructures of micro-injection molded connectors were investigated to figure out the relationship between flow properties in the micro-channel and fiber length distributions (FLD). Micro-CT and image processing techniques were performed to convert the images obtained by Micro-CT into 3D structures and visualize the fiber length distributions. It was verified by both experimental and numerical analyses that the fiber length distribution affects significantly the processability and flowability of the composite melt for injection molding of microconnectors since a large amount of glass fibers within the material worsen the rheological properties and long fibers hinder flowability at narrow junctions and micro scale channels.