Grafting density-induced smectic A to hexagonal columnar transition in mesogen-free isotactic liquid crystalline polyethers with n-dodecylsulfonyl side groups
Abstract
Highly dipolar mesogen-free liquid crystalline polymers are excellent candidates for achieving large spontaneous polarization under relatively low electric fields for advanced electrical and optical applications. In this report, the effect of grafting density of n-dodecylsulfonyl side chains on the mesogen-free liquid crystalline self-assembly of comb-like isotactic poly(oxypropylene) was studied. When the grafting density was 80–100%, a stable 21 helical chain conformation was induced by the strong dipole-dipole interactions among the sulfonyl groups in the side chains. Consequently, a smectic A self-assembly was induced. When the grafting density decreased to 60–80%, a poor and possibly imbalanced 21 helical chain conformation was formed due to the frequent absence of the n-dodecylsulfonyl side chains along the main chain. As a result, a hexagonal columnar self-assembly was realized. This study demonstrated that a delicate interplay between the molecular defects and dipole-dipole interactions can lead to different self-assembly structures.
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Case Western Reserve Univ., Cleveland, OH (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1618807
- Alternate Identifier(s):
- OSTI ID: 1656446; OSTI ID: 1899876
- Report Number(s):
- BNL-216309-2020-JAAM
Journal ID: ISSN 2666-5425; S2666542520300035; 100003; PII: S2666542520300035
- Grant/Contract Number:
- SC0018075; SC0012704
- Resource Type:
- Published Article
- Journal Name:
- Giant
- Additional Journal Information:
- Journal Name: Giant Journal Volume: 1 Journal Issue: C; Journal ID: ISSN 2666-5425
- Publisher:
- Elsevier
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Mesogen-free liquid crystalline polymer; Comb-like polymers; Grafting density; Dipole-dipole interaction; Hexagonal columnar phase; Mesogen-free, comb-like polymers, grafting density, dipole-dipole interaction, hexagonal columnar phase
Citation Formats
Kwok, Man-Hin, Bohannon, Caleb A., Crooks, Jordan L., Li, Ruipeng, Zhao, Bin, and Zhu, Lei. Grafting density-induced smectic A to hexagonal columnar transition in mesogen-free isotactic liquid crystalline polyethers with n-dodecylsulfonyl side groups. United Kingdom: N. p., 2020.
Web. doi:10.1016/j.giant.2020.100003.
Kwok, Man-Hin, Bohannon, Caleb A., Crooks, Jordan L., Li, Ruipeng, Zhao, Bin, & Zhu, Lei. Grafting density-induced smectic A to hexagonal columnar transition in mesogen-free isotactic liquid crystalline polyethers with n-dodecylsulfonyl side groups. United Kingdom. https://doi.org/10.1016/j.giant.2020.100003
Kwok, Man-Hin, Bohannon, Caleb A., Crooks, Jordan L., Li, Ruipeng, Zhao, Bin, and Zhu, Lei. Sun .
"Grafting density-induced smectic A to hexagonal columnar transition in mesogen-free isotactic liquid crystalline polyethers with n-dodecylsulfonyl side groups". United Kingdom. https://doi.org/10.1016/j.giant.2020.100003.
@article{osti_1618807,
title = {Grafting density-induced smectic A to hexagonal columnar transition in mesogen-free isotactic liquid crystalline polyethers with n-dodecylsulfonyl side groups},
author = {Kwok, Man-Hin and Bohannon, Caleb A. and Crooks, Jordan L. and Li, Ruipeng and Zhao, Bin and Zhu, Lei},
abstractNote = {Highly dipolar mesogen-free liquid crystalline polymers are excellent candidates for achieving large spontaneous polarization under relatively low electric fields for advanced electrical and optical applications. In this report, the effect of grafting density of n-dodecylsulfonyl side chains on the mesogen-free liquid crystalline self-assembly of comb-like isotactic poly(oxypropylene) was studied. When the grafting density was 80–100%, a stable 21 helical chain conformation was induced by the strong dipole-dipole interactions among the sulfonyl groups in the side chains. Consequently, a smectic A self-assembly was induced. When the grafting density decreased to 60–80%, a poor and possibly imbalanced 21 helical chain conformation was formed due to the frequent absence of the n-dodecylsulfonyl side chains along the main chain. As a result, a hexagonal columnar self-assembly was realized. This study demonstrated that a delicate interplay between the molecular defects and dipole-dipole interactions can lead to different self-assembly structures.},
doi = {10.1016/j.giant.2020.100003},
journal = {Giant},
number = C,
volume = 1,
place = {United Kingdom},
year = {Sun Mar 01 00:00:00 EST 2020},
month = {Sun Mar 01 00:00:00 EST 2020}
}
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