| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polymer actuator having excellent flexibility and expansion rate, capable of being driven even under a low electric filed, and having high insulation breakdown strength.SOLUTION: A polymer actuator consists of a polyurethane elastomer molding formed of polyurethane elastomer composition containing polyisocyanate component, active hydrogen component and catalyst, and the active hydrogen component in the polyurethane elastomer composition contains bifunctional polyol component and trifunctional polyol component, and the trifunctional polyol component is present in an amount of 50 to 80 mass% in the mass of the polyurethane elastomer composition. When classifying the active hydrogen component into a number average molecular weight (Mn), the active hydrogen component having the number average molecular weight (Mn) of 5000 to 12000, is present in an amount of 50 to 80 mass% in the mass of the polyurethane elastomer composition.</p> |
