文献类型：期刊文献

英文题名：Dynamic interfacial tension between a thermotropic liquid-crystalline polymer and a flexible polymer

作者：Yu, Ruobing[1,2]; Yu, Wei[2]; Zhou, Chixing[2]; Feng, J.J.[3,4]

机构：[1]Shanghai Jiao Tong Univ, Dept Polymer Sci & Engn, Shanghai 200240, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn 289, Shanghai 200237, Peoples R China;[3]Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z4, Canada;[4]Univ British Columbia, Dept Math, Vancouver, BC V6T 1Z4, Canada

年份：2006

卷号：101

期号：5

起止页码：3114

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20063310072087);WOS:【SCI-EXPANDED(收录号:WOS:000239128200049)】；

语种：英文

外文关键词：thermotropic liquid-crystalline polymer (TLCP); interface; tension; aspect ratio

摘要：When a short fiber of a thermotropic liquid-crystalline polymer retracts in a quiescent, flexible polymer matrix, the polydomain texture inside the fiber evolves simultaneously. We have demonstrated experimentally that the two processes are coupled. The dynamic interfacial tension, determined from the retraction of the short fiber, decreases with time. On the other hand, we have determined the aspect ratio of the polydomains inside the fiber through the power spectra of two-dimensional discrete Fourier transformations of polarized optical microscopy images. The polydomains are initially elongated and aligned with the fiber axis. As the fiber retracts into a spherical drop, the polydomains first retract into a circular shape and then are squeezed into elongated shapes perpendicular to the original fiber axis. An exponential function correlates the evolution of the dynamic interfacial tension with that of the aspect ratio of the textures. (c) 2006 Wiley Periodicals, Inc.