Formation of compositional gradient profiles by using shear-induced polymer migration phenomenon under Couette flow field

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• 作者：Sang Hyuk Im ; Su Jin Lee ; Duck Jong Suh…
• 关键词：Graded Index ; Compositional Gradient ; Polymer Migration ; Polymer Optical Fiber
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：32
• 期：7
• 页码：1422-1426
• 全文大小：602 KB
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• 作者单位：Sang Hyuk Im (1)
  Su Jin Lee (1)
  Duck Jong Suh (2)
  O Ok Park (2)
  Moo Hyun Kwon (3)
  
  1. Functional Crystallization Center, Department of Chemical Engineering, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi, 446-701, Korea
  2. Department of Chemical and Biomolecular Engineering (BK21+ Graduate Program), Korea Advanced Institute of Science and Technology (KAIST), 291, Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
  3. Department of Applied Chemistry, Woosuk University, 443, Samrae-ro, Sangrae-eup, Wanju-gun, Jeonbuk, 565-701, Korea
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Catalysis
  Materials Science
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1975-7220

文摘

We investigated whether a graded-index profile, specified by the polymer compositional gradient, could be formed using shear-induced polymer migration phenomenon in a polymer solution. For the presented model system, we generated a shear flow by rotating a glass rod at the center of a polystyrene/methylmethacrylate (PS/MMA) solution and measured the degree of polymer migration by the shear flow field by examining the concentration of polymer solution along the radial direction from the rotating axis to the periphery. Through model experiments, we formed a compositional gradient and controlled its profile in the solution by varying the concentration of polymer solution, molecular weight of polymer, and shear rate. Finally, we solidfied the gradient profiles by the polymerization of the PS/MMA solution and confirmed that the gradient profiles were maintained with a compositional gradient twice larger than the mother PS/MMA solution.