The use of the Wagner function to describe poled-order relaxation processes in electrooptic polymers

✍ Scribed by T. Verbiest; D.M. Burland

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 426 KB
• Volume: 236
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00229-w

✦ Synopsis

The Wagner (Iognormal) time decay function is used to describe decay of the second harmonic signal due to electric field poled-order relaxation in the guest-host polymer system 20 wt% lophine 1 in Ultem ®. This function can be related to a Gaussian distribution of Arrhenius activation energies. From the temperature dependence of the relaxation process one can determine the average value for the activation energy. In the present case a value of 40 kcal/mol is found consistent with experimental values obtained for a variety of other thermally activated processes in polymers.