Cybotactic nematic phase in main-chain polyesters with bent-core mesogens

E. Joon Choi; Young Ho Seo; Tahseen Kamal; Soo Young Park; Junji Watanabe

doi:10.1016/j.polymer.2014.02.050

Cybotactic nematic phase in main-chain polyesters with bent-core mesogens

E. Joon Choi
, Young Ho Seo
, Tahseen Kamal
, Soo Young Park
, Junji Watanabe

Kumoh National Institute of Technology
Kyungpook National University
Institute of Science Tokyo

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

New six main-chain polyesters containing bent-core mesogens with various central units (Ar = 1,2- or 1,3-phenylene and 1,6-, 1,7-, 2,3- or 2,7-naphthylene) were synthesized. All of the polymers were soluble in a mixture of phenol/p-chlorophenol/TCE (25/40/35 w/w/w). The inherent viscosities were in the range of 0.18-0.38 dL/g. Despite the existence of bent-core mesogens eliciting a remarkable diminution of molecular packing, polymer with Ar = 2,7-naphthylene formed a smectic phase, and polymers with both Ar = 1,2-phenylene and 2,3-naphthylene formed nematic phases. Moreover, most of the polymers were distinctly semi-crystalline. Herein, we report our findings regarding the first detection of cybotactic groups from the nematic phases of main-chain polyesters with bent-core mesogens.

Original language	English
Pages (from-to)	1931-1939
Number of pages	9
Journal	Polymer
Volume	55
Issue number	8
DOIs	https://doi.org/10.1016/j.polymer.2014.02.050
State	Published - 10 Apr 2014

Keywords

Bent-core mesogen
Cybotactic nematic phase
Synthesis of liquid crystalline polymers

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10.1016/j.polymer.2014.02.050

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title = "Cybotactic nematic phase in main-chain polyesters with bent-core mesogens",

abstract = "New six main-chain polyesters containing bent-core mesogens with various central units (Ar = 1,2- or 1,3-phenylene and 1,6-, 1,7-, 2,3- or 2,7-naphthylene) were synthesized. All of the polymers were soluble in a mixture of phenol/p-chlorophenol/TCE (25/40/35 w/w/w). The inherent viscosities were in the range of 0.18-0.38 dL/g. Despite the existence of bent-core mesogens eliciting a remarkable diminution of molecular packing, polymer with Ar = 2,7-naphthylene formed a smectic phase, and polymers with both Ar = 1,2-phenylene and 2,3-naphthylene formed nematic phases. Moreover, most of the polymers were distinctly semi-crystalline. Herein, we report our findings regarding the first detection of cybotactic groups from the nematic phases of main-chain polyesters with bent-core mesogens.",

keywords = "Bent-core mesogen, Cybotactic nematic phase, Synthesis of liquid crystalline polymers",

author = "Choi, \{E. Joon\} and Seo, \{Young Ho\} and Tahseen Kamal and Park, \{Soo Young\} and Junji Watanabe",

year = "2014",

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doi = "10.1016/j.polymer.2014.02.050",

language = "English",

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T1 - Cybotactic nematic phase in main-chain polyesters with bent-core mesogens

AU - Choi, E. Joon

AU - Seo, Young Ho

AU - Kamal, Tahseen

AU - Park, Soo Young

AU - Watanabe, Junji

PY - 2014/4/10

Y1 - 2014/4/10

N2 - New six main-chain polyesters containing bent-core mesogens with various central units (Ar = 1,2- or 1,3-phenylene and 1,6-, 1,7-, 2,3- or 2,7-naphthylene) were synthesized. All of the polymers were soluble in a mixture of phenol/p-chlorophenol/TCE (25/40/35 w/w/w). The inherent viscosities were in the range of 0.18-0.38 dL/g. Despite the existence of bent-core mesogens eliciting a remarkable diminution of molecular packing, polymer with Ar = 2,7-naphthylene formed a smectic phase, and polymers with both Ar = 1,2-phenylene and 2,3-naphthylene formed nematic phases. Moreover, most of the polymers were distinctly semi-crystalline. Herein, we report our findings regarding the first detection of cybotactic groups from the nematic phases of main-chain polyesters with bent-core mesogens.

AB - New six main-chain polyesters containing bent-core mesogens with various central units (Ar = 1,2- or 1,3-phenylene and 1,6-, 1,7-, 2,3- or 2,7-naphthylene) were synthesized. All of the polymers were soluble in a mixture of phenol/p-chlorophenol/TCE (25/40/35 w/w/w). The inherent viscosities were in the range of 0.18-0.38 dL/g. Despite the existence of bent-core mesogens eliciting a remarkable diminution of molecular packing, polymer with Ar = 2,7-naphthylene formed a smectic phase, and polymers with both Ar = 1,2-phenylene and 2,3-naphthylene formed nematic phases. Moreover, most of the polymers were distinctly semi-crystalline. Herein, we report our findings regarding the first detection of cybotactic groups from the nematic phases of main-chain polyesters with bent-core mesogens.

KW - Bent-core mesogen

KW - Cybotactic nematic phase

KW - Synthesis of liquid crystalline polymers

UR - https://www.scopus.com/pages/publications/84897914444

U2 - 10.1016/j.polymer.2014.02.050

DO - 10.1016/j.polymer.2014.02.050

M3 - Article

AN - SCOPUS:84897914444

SN - 0032-3861

VL - 55

SP - 1931

EP - 1939

JO - Polymer

JF - Polymer

IS - 8

ER -

Cybotactic nematic phase in main-chain polyesters with bent-core mesogens

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Keywords

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