Title :
The nature of dielectric measurement in polyblends of poly(methyl methacrylate) and poly(vinyledene fluoride)
Author :
Dubbey, R.K. ; Keller, J.M. ; Datt, S.C.
Author_Institution :
Dept. of Postgraduate Studies & Res. in Phys., Rani Durgavati Univ., Jabalpur, India
Abstract :
The dielectric ac bridge measurements have been carried out to understand molecular motion and their relaxation behaviour in PMMA:PVDF polyblends of different wt% composition. The dielectric constant (ε\´) and dielectric loss (ε") factors of 100 μm thick films of these polyblends were measured as a function of temperature in the range of 40 to 140°C and at different frequencies from 100 Hz to 10 MHz. The dielectric constant decreased with frequency and increased with temperature in the entire frequency range. The dielectric loss also increased with temperature in the studied frequency range. The observed characteristic behaviour has been consistently explained in terms of dipolar motions and the plasticization effect brought about by blending PMMA with PVDF
Keywords :
dielectric losses; permittivity; polymer blends; polymer films; 100 Hz to 10 MHz; 40 to 140 C; AC bridge; PMMA:PVDF polyblend; dielectric constant; dielectric loss; dielectric measurement; dipolar motion; molecular motion; plasticization; poly(methyl methacrylate); poly(vinyledene fluoride); relaxation; Bridges; Dielectric constant; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Frequency measurement; Loss measurement; Motion measurement; Temperature distribution; Thick films;
Conference_Titel :
Electrets, 1996. (ISE 9), 9th International Symposium on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-2695-4
DOI :
10.1109/ISE.1996.578243
