| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2019: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Outline of Final Research Achievements |
Monodomain liquid crystal elastomers (LCEs) have been prepared using liquid crystal block copolymers (LCBCPs) consisting of a nematic liquid crystal (NLC) main-chain polyester linked to cross-linkable polymethacrylate (PMA) at both ends. The LCBCPs were stretched in one direction and illuminated by UV light, yielding strips of monodomain LCEs composed of the LCBCP with the PMA blocks crosslinked via the thiol-ene reaction between the allyl moieties incorporated in the PMA segments and the thiol moieties. The NLC polyester with the LC director lying along the stretching direction (SD) was segregated from the crosslinked PMA block to form a lamellar microstructure. Rising the temperature caused the strips to decrease the LC orientational order. The strips fixed at one end contracted reversibly by a factor of 1.2-1.4 along the SD, deforming the microstructure. Those fixed at both ends increased the tensile stress to ~200 kPa while maintaining the microstructure unchanged.
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