Dielectric behavior and AC electrical conductivity analysis of PMMA films
Other Title(s)
التوصيلية الكهربائية المتناوبة لأغشية PMMA
Joint Authors
Hasan, Bushra Abbas
Shallal, Ikhlas Hamims
Source
Issue
Vol. 11, Issue 20 (31 Mar. 2013), pp.47-57, 11 p.
Publisher
University of Baghdad College of Science
Publication Date
2013-03-31
Country of Publication
Iraq
No. of Pages
11
Main Subjects
Topics
Abstract AR
حضرت أغشية من بولي مثيل اكرليت و بأسماك مختلفة بواسطة طريقة الصب.
أجريت قياسات التوصيلية الكهربائية المتناوبة σa.c(W) في مدى درجات الحرارة K (293-373) و في مدى التردد (107-104Hz).
لوحظ سلوك غير اعتيادي في دراسة معامل العزل و الذي اعزي إلى درجة حرارة التحول الزجاجي .تم دراسة تغير سلوك التوصيل الكهربائي و تأثيره على طاقة التنشيط.
أظهرت النتائج إن ميكانيكية التوصيل المسؤولة عن التوصيل هي التنطط.
القيم المحسوبة لطاقات التنشيط تغيرت مع السمك، التردد و درجة الحرارة.
علاقة التوصيل الكهربائي مع التردد آسية تؤكد التوصيل المتناوب و السلوك العزلي للبوليمر و الاستقطابية ازدادت مع درجة الحرارة بينما تناقصت مع زيادة السمك و الذي يشير إلى ضعف و زيادة قوى الترابط الجزيئي و على التوالي.
Abstract EN
PMMA films of different thickness (0.006, 0.0105, 0.0206, 0.0385 and 0.056cm) were synthesized by casting process.
The temperature and frequency dependence of dielectric constant and AC electrical conductivity measurements at various frequencies (10kHz-10MHz) and temperatures (293-373K) were carried out.
Few anomalies in dielectric studies were observed near 313 and 373 K respectively.
These points were related to glass transitions temperature.
The variation of activation energy and conduction behavior was studied .From the AC conduction studies, it is confirmed that the mechanism responsible for the conduction process is hopping of carriers.
The variations of the dielectric constant and loss as function of frequency at different temperature was observed and the results were discussed.
The calculated activation energy varied with the thickness, temperature, and applied frequency.
Conductivity plots against frequency suggested that the response obeying the universal power law concerning the AC conductivity and dielectric behavior of polymer.
The polarizability increases with temperature but decreases with thickness indicating weekends and rising of intermolecular forces respectively.
American Psychological Association (APA)
Hasan, Bushra Abbas& Shallal, Ikhlas Hamims. 2013. Dielectric behavior and AC electrical conductivity analysis of PMMA films. Iraqi Journal of Physics،Vol. 11, no. 20, pp.47-57.
https://search.emarefa.net/detail/BIM-342119
Modern Language Association (MLA)
Hasan, Bushra Abbas& Shallal, Ikhlas Hamims. Dielectric behavior and AC electrical conductivity analysis of PMMA films. Iraqi Journal of Physics Vol. 11, no. 20 (2013), pp.47-57.
https://search.emarefa.net/detail/BIM-342119
American Medical Association (AMA)
Hasan, Bushra Abbas& Shallal, Ikhlas Hamims. Dielectric behavior and AC electrical conductivity analysis of PMMA films. Iraqi Journal of Physics. 2013. Vol. 11, no. 20, pp.47-57.
https://search.emarefa.net/detail/BIM-342119
Data Type
Journal Articles
Language
English
Notes
Includes appendices : p. 56-57
Record ID
BIM-342119