| 摘要 |
An ABA tri-block copolymer represented by the following formula (1) [in the formula (1), n and m are each independently an integer of 30 to 1,000]. The copolymer is a so-called ABA tri-block copolymer between 8-vinyloxytricyclo[5.2.1.0<SUP>2.6</SUP>]decane and n-butyl vinyl ether, has rubber elasticity at normal temperature, and has a property of thermoplastic elastomer which has not been possessed by conventional vinyl ether copolymers.
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