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Hu JS, Li D, Zhang WC, Meng QB. Synthesis, structure, and properties of chiral liquid crystal monomers and polymers based on menthol. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26350] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Jia YG, Hu JS, Li D, Meng QB, Zhang X. Synthesis and phase behavior of chiral liquid crystalline polymeric networks derived from menthol. HIGH PERFORM POLYM 2012. [DOI: 10.1177/0954008312449843] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The synthesis of new chiral monomer 4-(menthyloxyacetoxy- benzoyloxy)biphenyl-4′-(2-(undec-10-e noyloxy)ethoxy)benzoate (ML), crosslinking agent 4-(undec-10-enoyloxy)biphenyl-4′-(2-(undec-10-enoyloxy)ethoxy)benzoate (CA), and liquid crystal polymer networks (E1−E5) containing menthyl group is presented. Their chemical structures and phase behavior were characterized with Fourier transform infrared (FT-IR), proton nuclear magnetic resonance (1H-NMR), elemental analyses, polarizing optical microscopy, differential scanning calorimetry, thermogravimetric analysis (TGA), and X-ray diffraction. The selective reflection of light for ML was investigated with ultraviolet/visible/near infrared (UV/Visible/NIR). By inserting a flexible spacer between the mesogenic core and the terminal menthyl groups, MLcould form mesophase and show a chiral smectic C phase, cholesteric phase and cubic blue phase. CA displayed a smectic A phase and nematic phase. The polymer networks containing less than 12 mol% of the crosslinking units showed reversible cholesteric phase transition, wide mesophase temperature range, and excellent thermal stability. With increasing the content of crosslinking unit, the corresponding Tg increased, the Ti decreased, and the mesophase temperature range narrowed for E1−E5. TGA showed that the Td(5%) was greater than 330°C for E1−E5.
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Affiliation(s)
| | - Jian-She Hu
- Center for Molecular Science and Engineering, College of Science, Northeastern University, Shenyang, China
| | - Dan Li
- Northeastern University, Shenyang, China
| | | | - Xia Zhang
- Northeastern University, Shenyang, China
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Meng FB, Zhang BY, Lian J, Wu YP, Li XZ, Yao DS. Mesomorphic behavior and optical properties of liquid-crystalline polysiloxanes bearing different chiral groups. J Appl Polym Sci 2009. [DOI: 10.1002/app.30437] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ahn SK, Nguyen Le LT, Kasi RM. Synthesis and characterization of side-chain liquid crystalline polymers bearing cholesterol mesogen. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23354] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Meng FB, Sun YH, Gao YM, Song XG, Zhang BY. Synthesis and characterization of chiral liquid-crystalline polysiloxanes containing fluorinated units and sulfonic acid groups. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zhang BY, Hu JS, Wang B, Yao DS, Li H. Synthesis and characterization of side-chain cholesteric elastomers derived from an isosorbide crosslinking agent. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-007-1742-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Synthesis and mesomorphic properties of cholesteric elastomers based on chiral mesogenic crosslinking agent. J Appl Polym Sci 2007. [DOI: 10.1002/app.26785] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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