scholarly journals Theoretical Predictions for Side-Chain Liquid-Crystal Polymers and Comparison to Experiment

1988 ◽  
Vol 134 ◽  
Author(s):  
F. Dowell
Keyword(s):  
Liquid Crystalline ◽  
Ad Hoc ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Side Chains ◽  
Crystalline Polymers ◽  
Theoretical Predictions ◽  
Experimental Values ◽  
First Time ◽  
Theoretical Results

ABSTRACTThis paper presents results from a unique microscopic molecular theory for side-chain liquid-crystalline polymers (LCPs) in the nematic (N) and multiple smectic-A (SA) LC phases and the isotropic (I) liquid phase. There are no ad hoc or arbitrarily adjustable parameters in this theory. The agreement between the theoretical and experimental values for various properties (including transition temperatures and quadratic characteristic radii) is very good (relative deviations between 0% and less than 6.2%). The theoretical results also show--for the first time--that the N and I phases for these LCPs involve the packing of plate-like sections of backbones and side chains and that the local bilayer SA phase involves packing of side-chains within a plate-like section. This type of packing is predicted to be typical for side-chain LCPs. This theory can predict-- for the first time--whether the side chains of a molecule pack on the same or alternating opposite sides of the backbone and whether side chains on different molecules interdigitate (overlap) with each other.

scholarly journals Prediction and Design of First Super-Strong Mostly-Rigid Polymers from Very Molecular Theories for Smectic and Nematic Polymers

1988 ◽  
Vol 134 ◽  
Author(s):  
F. Dowell
Keyword(s):  
Liquid Crystalline ◽  
Ad Hoc ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers ◽  
Smectic A ◽  
Molecular Ordering ◽  
Nematic Polymers ◽  
Experimental Values ◽  
Atom Bond

ABSTRACTThis paper presents a unique microscopic molecular theory for backbone liquid-crystalline polymers (LCPs), side-chain LCPs, and combined LCPs in the nematic (N) and multiple smectic-A (SA) LC phases and the isotropic (I) liquid phase. There are no ad hoc or arbitrarily adjustable parameters in this theory. The agreement between the theoretical and experimental values for various thermodynamic and molecular ordering properties for existing LCPs is very good (relative deviations between 0% and less than 6.2%). This theory has been used by this author to predict and design (atom by atom, bond by bond) the first super-strong (SS) LCPs. This paper presents the design of SS mostly-rigid (MR) LCPs.

scholarly journals Engineering Achiral Liquid Crystalline Polymers for Chiral Self-Recovery

2021 ◽  
Vol 22 (21) ◽  
pp. 11980
Author(s):  
Tengfei Miao ◽  
Xiaoxiao Cheng ◽  
Yilin Qian ◽  
Yaling Zhuang ◽  
Wei Zhang
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Uv Light ◽  
Helical Structure ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Polymeric Liquid ◽  
Crystalline Polymers ◽  
Liquid Crystal System ◽  
And Storage

Flexible construction of permanently stored supramolecular chirality with stimulus-responsiveness remains a big challenge. Herein, we describe an efficient method to realize the transfer and storage of chirality in intrinsically achiral films of a side-chain polymeric liquid crystal system by combining chiral doping and cross-linking strategy. Even the helical structure was destroyed by UV light irradiation, the memorized chiral information in the covalent network enabled complete self-recovery of the original chiral superstructure. These results allowed the building of a novel chiroptical switch without any additional chiral source in multiple types of liquid crystal polymers, which may be one of the competitive candidates for use in stimulus-responsive chiro-optical devices.

Influence of the spacer length on the phase behaviors of mesogen-jacketed liquid crystalline polymers with a bulk side-chain

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 54920-54928 ◽  
Author(s):  
Yongbing Luo ◽  
Sheng Chen ◽  
Hailiang Zhang
Keyword(s):  
Phase Behavior ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Side Chains ◽  
Spacer Length ◽  
Crystalline Polymers ◽  
Phase Behaviors

The alkyl spacer length influences the phase behavior and structure of mesogen-jacketed liquid-crystalline polymers with bulk side-chains.

Self-organization of cholesterol-side-chain liquid crystalline polymers by tailoring the main chain structure and flexible spacer length

2019 ◽  
Vol 43 (14) ◽  
pp. 5429-5440 ◽  
Author(s):  
Xiwen Yang ◽  
Shaonan Chen ◽  
Hang Luo ◽  
Haoran Xu ◽  
Sheng Chen
Keyword(s):  
Liquid Crystalline ◽  
Main Chain ◽  
Chain Structure ◽  
Self Organization ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Spacer Length ◽  
Crystalline Polymers ◽  
Smectic A ◽  
Flexible Spacer

Liquid crystal polymers with cholesterol side-chains formed different smectic A phases under the influence of the main-chain structure and flexible spacer length.

Synthesis and self-organization of azobenzene containing hemiphasmidic side-chain liquid-crystalline polymers with different spacer lengths

2016 ◽  
Vol 7 (2) ◽  
pp. 462-473 ◽  
Author(s):  
Yan-Shuang Xu ◽  
Dong Shi ◽  
Jun Gu ◽  
Zhen Lei ◽  
He-Lou Xie ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Self Organization ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Spacer Length ◽  
Crystalline Polymers

Hemiphasmidic side-chain liquid-crystal polymers form different columnar phases depending on the spacer lengthnand temperatureT.

Discotic columnar liquid-crystalline polymer semiconducting materials with high charge-carrier mobility via rational macromolecular engineering

2017 ◽  
Vol 8 (21) ◽  
pp. 3286-3293 ◽  
Author(s):  
Bin Mu ◽  
Xingtian Hao ◽  
Jian Chen ◽  
Qian Li ◽  
Chunxiu Zhang ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Cost Effective ◽  
Crystalline Polymer ◽  
Charge Carrier Mobility ◽  
Optoelectronic Device ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Semiconducting Materials ◽  
Organic Semiconducting Materials ◽  
Device Applications

Well-prepared side-chain discotic liquid crystal polymers with shorter spacers in ordered columnar phases are fascinating and promising cost-effective, solution-processable organic semiconducting materials for various potential optoelectronic device applications.

Polar Liquid Crystalline Polymers Bearing Mesogenic Side Chains with Large Dipole Moment

2021 ◽  
Author(s):  
Shuqi Dai ◽  
Jinxing Li ◽  
Junichi Kougo ◽  
Huanyu Lei ◽  
Satoshi Aya ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Polar Liquid ◽  
Side Chains ◽  
Crystalline Polymers

scholarly journals Phase Transitions of Side Chain Liquid Crystalline Polymers Having a Terminal Alkyl Chain.

1993 ◽  
Vol 50 (9) ◽  
pp. 687-691 ◽  
Author(s):  
Seiji UJIIE ◽  
Tamami FUKUI ◽  
Kazuko HIGAKI ◽  
Satoshi TAKAHASHI ◽  
Kazuyoshi IIMURA
Keyword(s):  
Phase Transitions ◽  
Liquid Crystalline ◽  
Alkyl Chain ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers
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