乙基纤维素和乙基纤维素丙烯酸体系的介电性能

10th International Symposium on Electrets (ISE 10). Proceedings (Cat. No.99 CH36256) Pub Date : 1999-09-22 DOI:10.1109/ISE.1999.832057

S. Jain, P. Khare

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引用次数: 1

摘要

在室温下，在10/sup 2/-10/sup 6/ Hz频率范围内测量了未掺杂和丙烯酸(AA)掺杂的乙基纤维素(EC)薄膜(厚度约为20微米)的介电常数和损耗，并逐渐增加AA浓度。介电常数随温度的变化可归因于低温区的热膨胀、Tg附近偶极分子的取向和Tg以上分子的随机热运动。介电损耗呈现一个峰值。发现丙烯酸的掺杂会影响损耗峰的大小和位置。在电荷转移络合物形成的基础上，对此进行了解释。

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Dielectric properties of ethyl cellulose and ethyl-cellulose acrylic acid system

Dielectric permittivities and losses were measured above room temperature in the frequency range 10/sup 2/-10/sup 6/ Hz for undoped and acrylic acid (AA) doped ethyl cellulose (EC) films (thickness about 20 microns) with progressively increasing AA concentration. The variation of permittivity with temperature is attributed to thermal expansion in the lower temperature region to the orientation of dipolar molecules in the neighbourhood of Tg and random thermal motion of molecules above Tg. The dielectric losses exhibit one peak. Doping with acrylic acid is found to affect the magnitude and position of the loss peak. An explanation for this has been attempted on the basis of charge transfer complex formation.

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10th International Symposium on Electrets (ISE 10). Proceedings (Cat. No.99 CH36256)

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