Liquid Crystalline Orientation of Rod Blocks within Lamellar Nanostructures from Rod−Coil Diblock Copolymers

2010 ◽  
Vol 43 (16) ◽  
pp. 6531-6534 ◽  
Author(s):  
Bradley D. Olsen ◽  
Xun Gu ◽  
Alexander Hexemer ◽  
Eliot Gann ◽  
Rachel A. Segalman
Keyword(s):  
Liquid Crystalline ◽  
Diblock Copolymers ◽  
Crystalline Orientation

Triply-periodic nanostructures in surfactant, block copolymer, and biomembrane systems, and simulation of TEMs

1993 ◽  
Vol 51 ◽  
pp. 884-885
Author(s):  
David M. Anderson ◽  
Tomas Landh
Keyword(s):  
Liquid Crystalline ◽  
Diblock Copolymers ◽  
Cubic Phase ◽  
List Type ◽  
Interpenetrating Networks ◽  
Triply Periodic ◽  
Wide Range ◽  
Bicontinuous Cubic ◽  
Phase Liquid ◽  
Dividing Surface

First discovered in surfactant-water liquid crystalline systems, so-called ‘bicontinuous cubic phases’ have the property that hydropnilic and lipophilic microdomains form interpenetrating networks conforming to cubic lattices on the scale of nanometers. Later these same structures were found in star diblock copolymers, where the simultaneous continuity of elastomeric and glassy domains gives rise to unique physical properties. Today it is well-established that the symmetry and topology of such a morphology are accurately described by one of several triply-periodic minimal surfaces, and that the interface between hydrophilic and hydrophobic, or immiscible polymer, domains is described by a triply-periodic surface of constant, nonzero mean curvature. One example of such a dividing surface is shown in figure 5.The study of these structures has become of increasing importance in the past five years for two reasons:1)Bicontinuous cubic phase liquid crystals are now being polymerized to create microporous materials with monodispersed pores and readily functionalizable porewalls; figure 3 shows a TEM from a polymerized surfactant / methylmethacrylate / water cubic phase; and2)Compelling evidence has been found that these same morphologies describe biomembrane systems in a wide range of cells.

Liquid crystalline orientation of polyfluorenes for polarized electroluminescence devices

2000 ◽  
Author(s):  
Katharine S. Whitehead ◽  
Martin Grell ◽  
Donal D. C. Bradley ◽  
Markus Jandke ◽  
Peter Strohriegl
Keyword(s):  
Liquid Crystalline ◽  
Crystalline Orientation

scholarly journals High Thermal Diffusivity in Thermally Treated Filamentous Virus-Based Assemblies with a Smectic Liquid Crystalline Orientation

Viruses ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 608 ◽  
Author(s):  
Toshiki Sawada ◽  
Yuta Murata ◽  
Hironori Marubayashi ◽  
Shuichi Nojima ◽  
Junko Morikawa ◽  
...  
Keyword(s):  
Thermal Diffusivity ◽  
Liquid Crystalline ◽  
Mean Free Path ◽  
Heat Conducting ◽  
Covalent Bonds ◽  
Crystalline Orientation ◽  
Conductive Materials ◽  
Polymeric Chains ◽  
High Thermal Diffusivity ◽  
M13 Phage

Polymers are generally considered thermal insulators because the amorphous arrangement of the polymeric chains reduces the mean free path of heat-conducting phonons. Recent studies reveal that individual chains of polymers with oriented structures could have high thermal conductivity, because such stretched polymeric chains effectively conduct phonons through polymeric covalent bonds. Previously, we have found that the liquid crystalline assembly composed of one of the filamentous viruses, M13 bacteriophages (M13 phages), shows high thermal diffusivity even though the assembly is based on non-covalent bonds. Despite such potential applicability of biopolymeric assemblies as thermal conductive materials, stability against heating has rarely been investigated. Herein, we demonstrate the maintenance of high thermal diffusivity in smectic liquid crystalline-oriented M13 phage-based assemblies after high temperature (150 °C) treatment. The liquid crystalline orientation of the M13 phage assemblies plays an important role in the stability against heating processes. Our results provide insight into the future use of biomolecular assemblies for reliable thermal conductive materials.

Synthesis of azobenzene-containing side chain liquid crystalline diblock copolymers using RAFT polymerization and photo-responsive behavior

2013 ◽  
Vol 130 (3) ◽  
pp. 2165-2175 ◽  
Author(s):  
Wuqiong Sun ◽  
Xiaohua He ◽  
Xiaojuan Liao ◽  
Shaoliang Lin ◽  
Wei Huang ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Side Chain ◽  
Responsive Behavior

Design, synthesis, and phase behaviors of a novel triphenylene-based side chain liquid crystalline diblock copolymer

2018 ◽  
Vol 42 (16) ◽  
pp. 13581-13588
Author(s):  
Jianfeng Ban ◽  
Lulu Pan ◽  
Bo Shi ◽  
Hailiang Zhang
Keyword(s):  
Diblock Copolymer ◽  
Liquid Crystalline ◽  
Diblock Copolymers ◽  
Weight Fraction ◽  
Side Chain ◽  
Design Synthesis ◽  
Phase Behaviors

Influence of the weight fraction of PMT6S on the phase behaviors of diblock copolymers.

Liquid-Crystalline Diblock Copolymers Produced by Living Cationic and Anionic Polymerizations

1998 ◽  
Vol 10 (2) ◽  
pp. 518-523 ◽  
Author(s):  
Ana Omenat ◽  
Johan Lub ◽  
Hartmut Fischer
Keyword(s):  
Liquid Crystalline ◽  
Diblock Copolymers
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