Enhancement of Surface-Relief Gratings Recorded on Amphiphilic Liquid-Crystalline Diblock Copolymer by Nanoscale Phase Separation

2005 ◽  
Vol 17 (18) ◽  
pp. 2184-2188 ◽  
Author(s):  
H. Yu ◽  
K. Okano ◽  
A. Shishido ◽  
T. Ikeda ◽  
K. Kamata ◽  
...  
Keyword(s):  
Phase Separation ◽  
Diblock Copolymer ◽  
Surface Relief ◽  
Liquid Crystalline ◽  
Nanoscale Phase Separation ◽  
Surface Relief Gratings

Control and Suppression of Surface Relief Gratings in Liquid-Crystalline Perfluoroalkyl–Azobenzene Polymers

2006 ◽  
Vol 16 (12) ◽  
pp. 1577-1581 ◽  
Author(s):  
F. You ◽  
M. Y. Paik ◽  
M. Häckel ◽  
L. Kador ◽  
D. Kropp ◽  
...  
Keyword(s):  
Surface Relief ◽  
Liquid Crystalline ◽  
Surface Relief Gratings

Highly Photosensitive Surface Relief Gratings Formation in a Liquid Crystalline Azobenzene Polymer:  New Implications for the Migration Process

2007 ◽  
Vol 40 (13) ◽  
pp. 4607-4613 ◽  
Author(s):  
Nobuyuki Zettsu ◽  
Toshinobu Ogasawara ◽  
Ryusuke Arakawa ◽  
Susaku Nagano ◽  
Takashi Ubukata ◽  
...  
Keyword(s):  
Surface Relief ◽  
Liquid Crystalline ◽  
Migration Process ◽  
Azobenzene Polymer ◽  
Surface Relief Gratings

Surface relief gratings induced by a nanosecond pulse in a liquid-crystalline azo-polymethacrylate

2005 ◽  
Vol 87 (20) ◽  
pp. 201914 ◽  
Author(s):  
F. J. Rodríguez ◽  
C. Sánchez ◽  
B. Villacampa ◽  
R. Alcalá ◽  
R. Cases ◽  
...  
Keyword(s):  
Surface Relief ◽  
Liquid Crystalline ◽  
Nanosecond Pulse ◽  
Surface Relief Gratings

Light-induced motions in azobenzene-containing polymers

2004 ◽  
Vol 76 (7-8) ◽  
pp. 1479-1497 ◽  
Author(s):  
Cristina Cojocariu ◽  
P. Rochon
Keyword(s):  
Polymer Films ◽  
Surface Relief ◽  
Liquid Crystalline ◽  
Polymer Structure ◽  
Polymer Chains ◽  
Polymer Materials ◽  
Physical Parameters ◽  
Covalently Bonded ◽  
Photorefractive Effects ◽  
Surface Relief Gratings

The following article is a tribute to the late Almeria Natansohn and is based on a brief summary of her research in azopolymers. She showed that reversible trans–cis–trans photoisomerization of aromatic azo groups covalently bonded within polymers could trigger a variety of motions in the polymer materials at molecular, nanometer, and micrometer levels. The photoinduced motions could be limited only to the azo rigid chromophore or could involve many polymer chains and ordered domains. Some of the effects of these motions such as reversible photo-orientation of chromophores, amplification effects, photorefractive effects, formation of surface relief gratings (SRGs), and photoinduced chirality and switching in amorphous and liquid-crystalline (LC) polymer films are discussed in relation to the polymer structure and physical parameters. Possible photonic applications originating from these phenomena are also mentioned.

Phase Separation in Liquid-Crystalline Copolymer/Poly(methyl methacrylate) Blends

1995 ◽  
Vol 60 (11) ◽  
pp. 1869-1874 ◽  
Author(s):  
Anatoly E. Nesterov ◽  
Yuri S. Lipatov ◽  
Vitaly V. Horichko
Keyword(s):  
Phase Separation ◽  
Methyl Methacrylate ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Ethylene Terephthalate ◽  
Crystalline Polymer ◽  
Scattering Method ◽  
Thermally Induced ◽  
Poly Methyl Methacrylate ◽  
Copolymer Poly

The phase separation in the blends of poly(methyl methacrylate) and liquid-crystalline polymer (copolymer of ethylene terephthalate and p-hydroxybenzoic acid) has been studied by the light scattering method and the cloud point curves have been obtained. Simultaneously some morphological features of the blends have been observed. It was found that the initial blends are in the state of forced compatibility and that thermally induced phase separation occurs by the mechanism of spinodal decomposition but presumably in the non-linear regime.

Sign in / Sign up

Export Citation Format

Share Document