| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.413 |
| 발표분야 | 기능성 고분자 |
| 제목 | Space Charge Enhanced Electrostrictive Effect in Polyurethane-Based Actuators |
| 초록 | Electroactive polymers (EAPs) can behave as actuators, changing their shape in response to electrical stimulation. Recently, it has been observed in polyurethane elastomers, a large electric-field applied state; the material exhibits fast response speeds, low hysteresis and large strain levels.1 At a more fundamental level, there exists one microscopic hypothesis that proposes to explain the basic mechanism responsible for polyurethane electrostiction. The hypothesis suggests that the presence of electrical charges inside the material is mostly responsible for the large electrictive strains. In this study, two types of polyurethanes (PUs) were used as electroactive polymer actuator. One of them is a PU with poly(dimethylsiloxnae)(PDMS), and the other is PU with poly(neopentyl adipate diol) (PNAD). PU with PDMS is polyether type, while PU with PNAD is polyester type. The presence of polyester’s methyl side group makes it more difficult for the hard segments to aggregate and sterically hinders mobility of the polymer chain. Then, phase mixing is greater in PU with PNAD than PU with PDMS. PU with PNAD had larger displacement than PU with PDMS (Figure 1). In results, the phase mixing morphology had larger displacement than phase separation morphology. Fig.1. Displacement on the application of the electric field (3MV/m) : [A]PU(PNAD) [B]PU(PDMS). |
| 저자 | 김철호, 박경미, 정해도, 이장우, 조남주 |
| 소속 | 부산대 |
| 키워드 | actuator; polyurethane |
