Pyroelectricity in Poled Thin Films of Aromatic Polyurea Prepared by Vapor Deposition Polymerization
Pyroelectricity in Poled Thin Films of Aromatic Polyurea Prepared by Vapor Deposition Polymerization
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气相沉积聚合芳香族聚脲极化薄膜的热释电特性
DOI：
10.1143/jjap.28.l2245
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发表时间：
1989
影响因子：
1.5
通讯作者：
E. Fukada
中科院分区：
文献类型：
--
作者：
Yoshikazu Takahashi;M. Iijima;E. Fukada
采用不同种类的芳香族二胺和二异氰酸酯单体，通过气相沉积聚合制备了厚度小于1 µm的芳香族聚脲薄膜。在玻璃化转变温度以上极化后，薄膜获得了（1.0–2.5）×10-5 C/m2K的热释电活性，与聚偏氟乙烯相当。活性的温度限制为150至200°C，具体取决于单体的种类。由芳香族聚脲和铝电极组成的多层膜表现出与层数成正比的高灵敏度。
Aromatic polyurea films with a thickness of less than 1 µm were prepared by vapor deposition polymerization using different kinds of aromatic diamine and diisocyanate monomers. After poling above the glass transition temperature, the films acquired a pyroelectric activity of (1.0–2.5)×10-5 C/m2K, which is comparable to that of polyvinylidene fluoride. The temperature limit for the activity was 150 to 200°C, depending on the kind of monomer. The multilayer films consisting of aromatic polyurea and aluminum electrodes showed a high sensitivity proportional to the number of layers.