New polymer film materials with good properties are reported. The difference between positive and negative coronas is also given. The films have good transmittance, excellent thermal and long-term stability, low diele...New polymer film materials with good properties are reported. The difference between positive and negative coronas is also given. The films have good transmittance, excellent thermal and long-term stability, low dielectric constant, and high glass transition temperature.展开更多
The preparation of PT/PEK c films is reported as well as their dielectric and optical properties. The c axis orientation ratio of the films is 68%. Dielectric constant and loss factor at 10 kHz is about 4.023 F/m and ...The preparation of PT/PEK c films is reported as well as their dielectric and optical properties. The c axis orientation ratio of the films is 68%. Dielectric constant and loss factor at 10 kHz is about 4.023 F/m and 0.003, respectively. The refractive indices of the films, n e and n o, are 1.657 3 and 1.627 8 at 0.63 μm wavelength, respectively. The optical band gap of the film with a thickness of 2.33 μm is found to be 3.06 eV.展开更多
基金The National Natural Science Foundation of China!(No. 69688005 and No. 69890230)
文摘New polymer film materials with good properties are reported. The difference between positive and negative coronas is also given. The films have good transmittance, excellent thermal and long-term stability, low dielectric constant, and high glass transition temperature.
文摘The preparation of PT/PEK c films is reported as well as their dielectric and optical properties. The c axis orientation ratio of the films is 68%. Dielectric constant and loss factor at 10 kHz is about 4.023 F/m and 0.003, respectively. The refractive indices of the films, n e and n o, are 1.657 3 and 1.627 8 at 0.63 μm wavelength, respectively. The optical band gap of the film with a thickness of 2.33 μm is found to be 3.06 eV.
