Flory's parameters in solutions of liquid-crystalline side-chain polymers in low-molecular weight liquid crystals

1990 ◽  
Vol 23 (23) ◽  
pp. 5020-5024 ◽  
Author(s):  
Gilles Sigaud ◽  
M. F. Achard ◽  
F. Hardouin ◽  
C. Coulon ◽  
H. Richard ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Low Molecular Weight

Dynamic Mechanical Relaxation Behavior of Low Molecular Weight Side-Chain Cyclic Liquid Crystalline Compounds near the Glass Transition Temperature

1996 ◽  
Vol 29 (17) ◽  
pp. 5650-5657 ◽  
Author(s):  
Michael E. De Rosa ◽  
W. Wade Adams ◽  
Timothy J. Bunning ◽  
Hongqin Shi ◽  
Shaw H. Chen
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Liquid Crystalline ◽  
Relaxation Behavior ◽  
Side Chain ◽  
Mechanical Relaxation ◽  
Low Molecular Weight ◽  
Dynamic Mechanical

Photoalignment and resulting holographic vector grating formation in composites of low molecular weight liquid crystals and photoreactive liquid crystalline polymers

2015 ◽  
Vol 120 (2) ◽  
pp. 217-222 ◽  
Author(s):  
Tomoyuki Sasaki ◽  
Takashi Shoho ◽  
Kohei Goto ◽  
Kohei Noda ◽  
Nobuhiro Kawatsuki ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Low Molecular Weight ◽  
Crystalline Polymers ◽  
Grating Formation

Aggregation Structure and Electro—Optical Properties of (Liquid Crystalline Polymer)/(Low Molecular Weight Liquid Crystal) Composite System

1989 ◽  
Vol 171 ◽  
Author(s):  
Tisato Kajiyama ◽  
Hirotsugu Kikuchi ◽  
Akira Miyamoto ◽  
Satoru Moritomi ◽  
Jenn—Chiu Hwang
Keyword(s):  
Molecular Weight ◽  
Light Scattering ◽  
Electric Field ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Smectic Phase ◽  
Side Chain ◽  
Low Molecular Weight ◽  
Smectic Layer

ABSTRACTA series of thin films composed of liquid crystalline polymer (LCP) and low molecular weight liquid crystal (LMWLC) was prepared by a solventcasting method or by a bar—coating method. LCPs were of mesogenic side chain type with strong or weak polar terminalgroups in the side chain portion. A mixture of smectic LCP (LCP with side chain of strong polar end) and nematic LMWLC formed a smectic phase in a LCP weight fraction range above 50 %. Also, a mixture of nematic LCP (LCP with side chain of weak polar end) and nematic LMWLC with strong polar group induced a new smectic phase in a LCP molar fraction range of 20–80 %. Reversible and bistable electro-optical effects based on light scattering were recognized for a smectic phase of a binary composite composed of LCP and LMWLC. A light scattering state caused by many fragmented smectic lamellae appeared in the case of application of an a.c. electric field below a threshold frequency (∼l Hz). Furthermore, application of a 100 Vp—p a.c. field of 1 kHz made the transmission light intensity increased to 94 % within a few seconds. The optical heterogeneity in asmectic layer composed of the side chain group of LCP was caused by the difference of twoforces based on both dielectric anisotropy of the side chain and electrohydrodynamic motion of the main chain. Since application of a low frequency electric field causes an ioniccurrent throughout the mixture film, it is reasonable to consider that an induced turbulent flow of main chains by an ionic current collapsed a fairly well organized large smectic layer into many small fragments, resulting in an increase in light scattering. The response speed of LCP upon application of an electric field increased remarkably by mixingLMWLC. In the case of a smectic mesophase, turbid and transparent states remained unchanged as it was, even though after removing an electric field.1Such abistable and reversiblelight switching driven by two different frequencies of electric field could be newly realized by both characteristics of turbulent effect of a wellorganized large smectic layer of LCP and rapid response of LMWLC. We believe that the LCP/LMWLC mixture system is promissing as a novel type of “light valve” exhibiting memory effect (bistable light switching).

Crosslinking of vinyl-terminated side-chain liquid crystalline polyethers using low molecular weight analogous mesogenic esters as reactive diluents

Polymer ◽  
2002 ◽  
Vol 43 (24) ◽  
pp. 6391-6396 ◽  
Author(s):  
Lourdes Callau ◽  
José Antonio Reina ◽  
Ana Mantecón
Keyword(s):  
Molecular Weight ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Low Molecular Weight ◽  
Reactive Diluents

Liquid crystalline block copolymers as adaptive agents for compatibility between CdSe/ZnS quantum dots and low-molecular-weight liquid crystals

2019 ◽  
Vol 7 (15) ◽  
pp. 4326-4331 ◽  
Author(s):  
Miron Bugakov ◽  
Natalia Boiko ◽  
Pavel Samokhvalov ◽  
Xiaomin Zhu ◽  
Martin Möller ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Quantum Dots ◽  
Liquid Crystals ◽  
Block Copolymers ◽  
Liquid Crystalline ◽  
Triblock Copolymers ◽  
Low Molecular Weight ◽  
Adaptive Agents

Liquid crystalline (LC) triblock copolymers were used either as (i) a nematic matrix, which can be loaded with 10 wt% of CdSe/ZnS QDs, or (ii) a compatibilizer, which allows more than 1 wt% of QDs to be introduced in low-molecular-weight cholesteric LCs.

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