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
文摘为了研究PEK-C膜热解交联过程的反应机理,通过制备PEK-C膜进行热解交联实验来确定该过程的分子结构变化,并以此为基础构建模型并对PEK-C热解交联过程进行分子模拟,通过拟合实验与分子模拟结果来探究反应截断半径、反应温度与交联度间的变化规律.结果表明:交联温度介于643~748 K之间且交联度随温度的升高而增加;截断半径为0.3~0.6 nm且交联度随截断半径的增加而增加;交联反应截断半径随反应温度的增加而增加且二者呈线性关系,热解交联过程最适反应温度为658~743 K.
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.
基金The National Natural Science Foundation of China(No.61372103)the Natural Science Foundation of Jiangsu Province(No.BK20201265)the National Engineering Research Center of Classified Protection and Safeguard Technology for Cyber security(No.C21640-2).