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KMID : 1024520180270111023
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Journal of the Environmental Sciences
2018 Volume.27 No. 11 p.1023 ~ p.1028
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Synthesis and Characteristics of 2 Step-curable Shape Memory Polyurethane
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Noh Geon-Ho
Lee Seung-Jae
Bae Seong-Guk
Jang Seong-Ho
Lee Won-Ki
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Abstract
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Shape memory materials are widely used in high-tech industries. Although shape memory polymers have been developed, they have a disadvantage, only unidirectional resilience. Shape memory polymers with bi-directional recovery resilience have been actively studied. In this study, a bidirectional shape memory polyurethane was synthesized using poly(ε-caprolactone) diol, methylene dicyclohexyl diisocyanate, and hydroxyethyl acrylate. The first physical curing occurred between hard segments and hydrogen bondings when the solution was dried. The second curing in acrylate groups was performed by UV exposure. A degree of curing was analyzed by infrared spectroscopy. The shape memory properties of 2 step-cured polyurethanes were investigated as a function of UV curing time.
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KEYWORD
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Shape memory polymer, Polyurethane, Resilience, UV curing
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