Laser-induced temperature distribution in photo-alignment of azobenzene liquid crystalline side chain polymers

被引：0

作者：

Wang, X. ^{[1
]}

Shen, W. ^{[1
]}

Zhang, Q. ^{[1
]}

Li, T. ^{[1
]}

Cheng, X. ^{[1
]}

机构：

[1] Dept. of Polymer Science and Eng., Univ. of Sci. and Technol. of China, Hefei, Anhui 230026, China

来源：

Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals | 2000年 / 350卷

基金：

中国国家自然科学基金;

关键词：

Glass transition - Laser beam effects - Light polarization - Mathematical models - Molecular orientation - Numerical analysis - Plastic films - Temperature distribution - Thermal effects;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A theoretical model has been worked out to describe a temperature field, which is established within a film of isotropic trans azobenzene liquid crystalline side chain (LCSC) polymers when a linearly polarized laser beam illuminates it, and contributes to the photo-induced alignment behavior of LCSC polymers at an ambient temperature below the glassy transition temperature (Tg). The distribution of the temperature field is analyzed and the mechanism that the mesogens align perpendicular to the electric vector of the light is discussed with this model. The minimum light intensity Ioff required to achieve the photo-induced phase transition of LCSC polymers at a certain temperature below Tg is calculated. A prediction of existence of an offset photo-alignment temperature Toff is made based on this theory model, while below this temperature no photo-induced phase transition can be observed when a light of certain intensity illuminates the sample.

引用

页码：225 / 235

共 50 条

[1] Laser-induced temperature distribution in photo-alignment of azobenzene liquid crystalline side chain polymers
Wang, XH
Shen, WL
Zhang, QJ
Li, T
Cheng, XF
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 2000, 350 : 225 - +
[2] Instantaneous temperature field induced by laser pulse in azobenzene liquid crystalline side chain polymers before alignment
Liu, J
Lu, Y
Li, J
Zhao, D
Zhang, QJ
Cheng, XF
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2003, 11 (05) : 697 - 705
[3] Dynamic temperature distribution in photo-induced alignment of azobenzene liquid crystalline polymer
Zhao, D
Zhang, QJ
Lu, Y
Li, J
Liu, J
Cheng, XF
MACROMOLECULAR THEORY AND SIMULATIONS, 2003, 12 (09) : 690 - 695
[4] Photoinduced alignment of liquid crystalline polymers containing azobenzene moieties in the side chain
Liu, J.
Zhang, Q.J.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering, 2001, 17 (02):
[5] Synthesis of Side-chain Liquid Crystal Polymers and Preliminary Studies of the Property of Photo-alignment
Zhao Yulei
Zhang Weimin
Li Jilei
Pu Jialing
GREEN PRINTING AND PACKAGING MATERIALS, 2012, 380 : 301 - 305
[6] Study on the Photo-alignment Performance of Liquid Crystalline Polymers with Photosensitive Groups
Cao, Jin
Zhang, Weimin
Pu, Jialing
NIP28: 28TH INTERNATIONAL CONFERENCE ON DIGITAL PRINTING TECHNOLOGIES / DIGITAL FABRICATION 2012, 2012, : 47 - 50
[7] Thermal imidization and properties of polyimide with azobenzene side-chain for photo-alignment film
Tong, Faqin
Wang, Jingqiang
Zheng, Feng
MATERIALS TODAY COMMUNICATIONS, 2021, 26
[8] Synthesis and Properties of Side Chain Azobenzene Liquid Crystalline Polymers
Yao, Danshu
He, Jun
Wang, Haiyan
Tian, Mei
He, Xiaozhi
Hu, Jianshe
ADVANCES IN CHEMICAL ENGINEERING III, PTS 1-4, 2013, 781-784 : 436 - 439
[9] Photo-alignment properties of photo-crosslinked films of liquid crystalline polymers containing chalcone derivatives
Mihara, T
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 2005, 441 : 185 - 200
[10] LASER-INDUCED REORIENTATION OF THE OPTICAL-AXIS IN LIQUID-CRYSTALLINE SIDE-CHAIN POLYMERS
ANDERLE, K
BIRENHEIDE, R
EICH, M
WENDORFF, JH
MAKROMOLEKULARE CHEMIE-RAPID COMMUNICATIONS, 1989, 10 (09): : 477 - 483

← 1 2 3 4 5 →