Dielectric Relaxation Behavior of Absorbed Water on Aromatic Polyesters.
نویسندگان
چکیده
منابع مشابه
Dielectric Relaxation of Biological Water†
Dielectric relaxation and NMR spectrum of water in biological systems such as proteins, DNA, and reverse micelles can often be described by two widely different time constants, one of which is in the picosecond while the other is in the nanosecond regime. Although it is widely believed that the bimodal relaxation arises from water at the hydration shell, a quantitative understanding of this imp...
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ترانسفورماتورهای قدرت از اجزای اصلی شبکه تامین انرژی الکتریکی می باشند که عملکرد قابل اطمینان ترانسفورماتورها یکی از فاکتورهای مهم و تعیین کننده در تامین انرژی الکتریکی محسوب می شود. در نتیجه بررسی و مانیتور عملکرد ترانسفورماتورها در شبکه و همچنین عیب یابی این ترانسفورماتورها غیرقابل اجتناب و ضروری می باشد. به طور کلی عایق های مایع در صنعت فشار قوی کاربردهای متفاوتی دارند که مهمترین وظیفه آنها...
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Dielectric spectra of dimethyl sulfoxide (DMSO)/water mixtures, over the entire concentration range, have been measured using the transmission line method at frequencies from 45 MHz to 26 GHz and at temperatures of 298-318 K. The relaxation times of the mixtures show a maximum at an intermediate molar fraction of DMSO. The specific structure of mixtures in different concentration regions was de...
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A distribution function has been incorporated into polarization and the information about the distribution function has been obtained from the experimental results of water and from the existing theoretical models for dielectric dispersion. The theoretical values of the relaxation terms obtained from Davidson-Cole equation are very close to the relaxation terms evaluated from the experimental d...
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Glassy aqueous binary mixtures generally exhibit a water induced dielectric relaxation. The characteristic time-scale of this relaxation follows an Arrhenius temperature dependence with a nearly universal activation energy. We here demonstrate for a series of model aqueous mixtures that the relaxation time also follows a remarkably general exponential dependence on the weight fraction of water....
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ژورنال
عنوان ژورنال: KOBUNSHI RONBUNSHU
سال: 1992
ISSN: 0386-2186,1881-5685
DOI: 10.1295/koron.49.521