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Invited Articles

Main-chain side-chain combined liquid crystalline polymers bearing azobenzene and biphenyl-based mesogens – segregation of the mesogens within two distinct layers

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Pages 1020-1030 | Received 01 Feb 2022, Accepted 22 Feb 2022, Published online: 23 Mar 2022

References

  • Reck B, Ringsdorf H. Combined liquid crystalline polymers: mesogens in the main chain and as side groups. Makromol Chem Rapid Commun. 1985;6:291–299.
  • Chapter 5 of the book - Liquid Crystalline Polymers by A M Donald, A H Windle and S Hanna. 2nd ed. Cambridge University Press. Cambridge, United Kingdom May 2006
  • Zentel R. LC-polymers and smectic phases with special substructures/nanophase segregation. Macromol Chem Phys. 2021. DOI:https://doi.org/10.1002/macp.202100216
  • Reck B, Ringsdorf H. Combined liquid-crystalline polymers: rigid rod and semiflexible main chain polyesters with lateral mesogenic groups. Makromol Chem Rapid Commun. 1986;7:389–396.
  • Endres BW, Ebert M, Wendorff JH, et al. Combined main chain/side chain polymers. A new class of liquid crystalline polymers with unusual structural, thermodynamic and dynamic properties. Liq Cryst. 1990;7:217–239.
  • Diele S, Naumann M, Kuschel F, et al. X-ray investigation of combined main-chain/side-chain liquid-crystalline polymers. Liq Cryst. 1990;7:721–729.
  • Zentel R, Reckert G, Reck B. New liquid-crystalline polymers with chiral phases. Liq Cryst. 1987;2:83–89.
  • Zentel R, Schmidt GF, Meyer J, et al. X-ray investigations of linear and cross-linked liquid-crystalline main chain and combined polymers. Liq Cryst. 1987;2:651–664.
  • Zentel R, Brehmer R. Combined LC main chain/side chain polymers. Acta Polymer. 1996;47:141–149.
  • Watanabe J, Hayashi M. Thermotropic liquid crystals of polyesters having a mesogenic p,p'-bibenzoate unit. 2. X-ray study on smectic mesophase structures of BB-5 and BB-6. Macromolecules. 1989;22:4083–4088.
  • Watanabe J, Komura H, Niiori T. Thermotropic liquid crystals of polyesters having a mesogenic 4,4'-bibenzoate unit smectic mesophase properties and structures in dimeric model compounds. Liq Cryst. 1993;13:455–465.
  • Piao XL, Kim JS, Yun YK, et al. Combined type liquid crystalline polymers composed of poly(p-phenylene terephthalate) main chain and azobenzene mesogenic side groups attached through polymethylene spacers. Macromolecules. 1997;30:2294–2299.
  • Ge JJ, Zhang A, McCreight KW, et al. Phase structures, transition behaviors, and surface alignment in polymers containing rigid-rodlike backbones with flexible side chains. 1. Monotropic phase behavior in a main-chain/side-chain liquid crystalline polyester. Macromolecules. 1997;30:6498–6506.
  • Chen BQ, Kameyama A, Nishikubo T. New combined liquid crystalline polymers from polyaddition of biphenol diglycidyl ether and trimeric esters. Macromolecules. 1999;32:6485–6492.
  • Sato M, Mizoi M. Relationships between structures and liquid crystalline and optical properties in combined-type copolyisophthalates having nitro- and methoxyazobenzene units and aliphatic spacers in the side chain. Polym J. 2004;36(8):607–616.
  • Sato M, Mizoi M, Yano H. Liquid crystalline homopolyesters having main chain calamitic mesogens and one or two side chain azobenzene moieties in the repeat units. Liq Cryst. 2004;31:1219–1226.
  • Zhou M, Han CD. Synthesis and characterization of a combined main-chain/side-chain liquid-crystalline polymer exhibiting both thermotropic and lyotropic characteristics and its lyotropic phase behavior. Macromolecules. 2005;38:9602–9609.
  • Xie HL, Jie CK, Yu ZQ, et al. Hierarchical supramolecular ordering with biaxial orientation of a combined main-chain side-chain liquid-crystalline polymer obtained from radical polymerization of 2-vinylterephthalate. J Am Chem Soc. 2010;132:8071–8080.
  • Chang WY, Shi D, Jiang XQ, et al. Precise polyethylene derivatives bearing mesogenic side-chains: delicate self-assembly depending on graft density. Polym Chem. 2020;11:1454–1461.
  • Roy RK, Gowd EB, Ramakrishnan S. Periodically grafted amphiphilic copolymers: nonionic analogues of ionenes. Macromolecules. 2012;45:3063–3069.
  • Mandal J, Prasad SK, Rao DSS, et al. Periodically clickable polyesters: study of intrachain self-segregation induced folding, crystallization, and mesophase formation. J Am Chem Soc. 2014;136:2538–2545.
  • Chanda S, Ramakrishnan S. Poly(alkylene itaconate)s – an interesting class of polyesters with periodically located exo-chain double bonds susceptible to Michael addition. Polym Chem. 2015;6:2108–2114.
  • Chanda S, Ramakrishnan S. Controlling interlamellar spacing in periodically grafted amphiphilic copolymers. Macromolecules. 2016;49:3254–3263.
  • Sarkar R, Gowd EB, Ramakrishnan S. De-symmetrizing periodically grafted amphiphilic copolymers: design, synthesis and generation of Janus folded chains. Polym Chem. 2019;10:1730–1740.
  • Sarkar R, Gowd EB, Ramakrishnan S. Precise control of grafting density in periodically grafted amphiphilic copolymers: an alternate strategy to fine-tune the lamellar spacing in the sub-10 nm regime. Polym Chem. 2020;11:4143–4154.
  • Berda EB, Lande RE, Wagener KB. Precisely defined amphiphilic graft copolymers. Macromolecules. 2007;40:8547–8552.
  • Le Fevere de Ten Hove C, Penelle J, Ivanov DA, et al. Encoding crystal microstructure and chain folding in the chemical structure of synthetic polymers. Nat Mater. 2004;3:33–37.
  • Stempfle F, Ortmann P, Mecking S. Long-chain aliphatic polymers to bridge the gap between semicrystalline polyolefins and traditional polycondensates. Chem Rev. 2016;116:4597–4641.
  • Trigg EB, Stevens MJ, Winey KI. Chain folding produces a multilayered morphology in a precise polymer: simulations and Experiments. J Am Chem Soc. 2017;139:3747–3755.
  • Orodepo GO, Gowd EB, Ramakrishnan S. Periodically spaced side-chain liquid crystalline polymers. Macromolecules. 2020;53:8775–8786.
  • Rössle M, Braun L, Schollmeyer D, et al. Differences between smectic homo‐and co‐polysiloxanes as a consequence of microphase separation. Liq Cryst. 2005;32:533–538.
  • Orodepo GO, Gowd EB, Ramakrishnan S. Main-chain liquid crystalline polymers bearing periodically grafted folding elements. Polym Chem. 2021;12:1050–1059.
  • Ungar G. Structure of rotator phases in n-alkanes. J Phys Chem. 1983;87:689–695.
  • Qiu W, Sworen J, Pyda M, et al. Effect of the precise branching of polyethylene at each 21st CH2 group on its phase transitions, crystal structure and morphology. Macromolecules. 2006;39:204–217.
  • Albertini G, Fanelli E, Melone S, et al. Evidence by X-ray diffraction for hexatic B and crystal B structures in a pure compound. Solid State Commun. 1984;49:1143–1146.
  • Chang WY, Zhang YF, Wang J, et al. Competition of lamellar crystal and smectic liquid crystal in precise polyethylene derivative bearing mesogenic side-chains. CCS Chem. 2021;3:763–772.

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