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Synthesis of liquid crystalline block copolymer obtained by using main-chain polyurethane initiator and its thermal properties

Nanako Higashi et al · Society for Science and Technology · 2023

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Author / responsible party
Nanako Higashi et al
Publisher
Society for Science and Technology
Year
2023
ISSN
2186-4942
ISSN
2186-4942
Language
English

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A novel main-chain polyurethane initiator was obtained by the ternary polyaddition of mesogenic diol, aliphatic azodiol (initiator component), and diisocyanate. The mesogenic diol, in which 6-hydroxyhexyloxy groups linked to both sides of azobenzene, was synthesized. Subsequently, the novel liquid crystalline block copolymer, which has a multiblock structure consisting of alternately linked main-chain polyurethane and polymethacrylate units, was obtained by the radical polymerization of a methacrylate monomer (M11) having benzoic acid as the end group using the main-chain polyurethane initiator. The main-chain polyurethane initiator formed a nematic phase on the heating and cooling processes. Furthermore, the homopolymethacrylate (HPM11) obtained from M11 exhibited a smectic A phase. The main-chain polyurethane initiator could not be miscible with HPM11, and the phase separation was formed. However, the liquid crystalline block copolymer uniformly exhibited the nematic phase on the heating and cooling processes.

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APA 7

al, N. H. E. (2023). Synthesis of liquid crystalline block copolymer obtained by using main-chain polyurethane initiator and its thermal properties. https://doi.org/10.11425/sst.12.73

MLA

al, Nanako Higashi et. "Synthesis of liquid crystalline block copolymer obtained by using main-chain polyurethane initiator and its thermal properties." 2023. https://doi.org/10.11425/sst.12.73.

Chicago

al, Nanako Higashi et. 2023. "Synthesis of liquid crystalline block copolymer obtained by using main-chain polyurethane initiator and its thermal properties.". https://doi.org/10.11425/sst.12.73.

Harvard

al, N. H. E. 2023, Synthesis of liquid crystalline block copolymer obtained by using main-chain polyurethane initiator and its thermal properties, Society for Science and Technology, available at: https://doi.org/10.11425/sst.12.73 [Accessed 8 Aug. 2026].

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Title
Synthesis of liquid crystalline block copolymer obtained by using main-chain polyurethane initiator and its thermal properties
Author / contributors
Nanako Higashi et al
Publisher
Society for Science and Technology
Publication year
2023
ISSN
2186-4942
ISSN
2186-4942
Language
English
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