Experimental study on dielectric relaxation in alfa fiber reinforced epoxy composites

被引：43

作者：

Arous, M.

Ben Amor, I.

Boufi, S.

Kallel, A.

机构：

[1] Fac Sci Sfax, LaMaCoP, Sfax, Tunisia

[2] Fac Sci Sfax, LMSE, Sfax, Tunisia

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2007年 / 106卷 / 06期

关键词：

composites; charge transport; dielectric properties;

D O I：

10.1002/app.26885

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Investigation on dielectric properties and behavior of thermoset epoxy composite based on cellulosic fibers has been carried on. Dielectric spectra were measured in the frequency range 0.1 Hz-100 kHz and at temperature intervals from ambient to 200 degrees C. For the composite, four relaxations processes were identified, namely the orientation polarization imputed to the presence of polar water molecules in Alfa fiber, the a mode relaxation associated with the glass transition of the epoxy resin matrix, the relaxation process associated with conductivity occurring as a result the carriers charges diffusion noted for high temperature above glass transition and low frequencies, and interfacial or MaxwellWagner-Sillars relaxation that is attributable to the accumulation of charges at the Alfa fibers/epoxy resin interfaces. Dielectric relaxation analysis revealed evolution in water relaxation and it is thus concluded that the chemical treatment of the fiber can strongly influence the dielectrical properties and interfacial polarization processes in composites.

引用

页码：3631 / 3640

页数：10

共 35 条

[1] Modification of cellulose fibers with functionalized silanes: Effect of the fiber treatment on the mechanical performances of cellulose-thermoset composites [J].