学位论文详细信息
Nematic ordering of wormlike polymers
Physics & Astronomy;Phase transion;Nematic;Isotropic;Wormlike
Yuan, Xiangqun
University of Waterloo
关键词: Physics & Astronomy;    Phase transion;    Nematic;    Isotropic;    Wormlike;   
Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/1280/1/x2yuan2005.pdf
瑞士|英语
来源: UWSPACE Waterloo Institutional Repository
PDF
【 摘 要 】

In this thesis, based on the Onsager excluded volume interaction model, two nematic ordering problems of wormlike (semiflexible) polymer are studied: one is to investigate the isotropic-nematic interface of polymers for three typical cases—the flexible one, the rigid-rod one and the intermediate one; the other is to investigate a very long polymer confined between two infinite flat hard walls.

Many previous studies of the isotropic-nematic phase coexistence are mainly focused on either rigid rod-like polymers with small flexibility, or flexible polymers with large flexibility. The phase coexistence of polymers with intermediate flexibility is desired to be investigated. For these three typical cases (flexible, rigid-rodand intermediate), the profiles for density, order parameter and tension contribution were shown for different tilt angles. The interface tension was studied. The simulation results are consistent with those reported by other people.

We investigated the confinement of a long polymer between two flat hard walls, which are separated by a distance comparable to theeffective Kuhn length of polymer chain by the wormlike chain model with or without the Onsager excluded volume interaction. Without theinteraction, the results are compared with those of the Gaussian chain model. Including the interaction, the phase diagram is analyzed.

【 预 览 】
附件列表
Files Size Format View
Nematic ordering of wormlike polymers 11338KB PDF download
  文献评价指标  
  下载次数:13次 浏览次数:26次