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

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.",

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

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

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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

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DO - 10.1016/j.polymer.2014.02.050

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VL - 55

SP - 1931

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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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