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

被引：0

作者：

Im, Sang Hyuk ^{[1
]}

Lee, Su Jin ^{[1
]}

Suh, Duck Jong ^{[2
]}

Park, O. Ok ^{[2
]}

Kwon, Moo Hyun ^{[3
]}

机构：

[1] Kyung Hee Univ, Dept Chem Engn, Funct Crystallizat Ctr, Yongin 446701, Gyeonggi, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Grad Program BK21, Taejon 305701, South Korea

[3] Woosuk Univ, Dept Appl Chem, Wanju Gun 565701, Jeonbuk, South Korea

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2015年 / 32卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

Graded Index; Compositional Gradient; Polymer Migration; Polymer Optical Fiber; OPTICAL-FIBER PREFORM; CENTRIFUGAL FORCE; DILUTE-SOLUTIONS; FABRICATION; RHEOLOGY;

D O I：

10.1007/s11814-014-0344-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：1422 / 1426

页数：5