Presentation Information
[16a-PA7-13]Polarity dependence of poling treatment in polyurea thin films prepared by vapor deposition polymerization with spontaneous orientational polarization
Tatsumi Kitamura1, Serina Tamaki1, Shinya Kawano2, 〇Ryosuke Matsubara1, Atsushi Sugita1, Kenji Ishida2, Atsushi Kubono1 (1.Shizuoka Univ., 2.Kyushu Univ.)
Keywords:
polyurea,vapor deposition polymerization,spontaneous orientational polarization
The orientational structure and polarization properties of vapor-deposited polyurea thin films were investigated. Second-harmonic generation (SHG) was observed in the as-deposited films, suggesting the presence of spontaneous orientational polarization. The SHG intensity and piezoelectric coefficient showed different changes depending on the polarity of corona poling. Larger values were obtained after negative-polarity poling. These results suggest that the dipole moments of the urea linkages are preferentially oriented toward the aluminum substrate.