Crystal Research and Technology
Cryst. Res. Technol. 42, 157 (2007) - Abstract -

Spectroscopic and thermal investigations of poly(vinylidene fluoride) films composites with LaNi3Co2

I. S. Elashmawi, N. A. Elsheshtawi*, H. I. Abdelkader*, and N. A. Hakeem

Spectroscopy Department, Physics Division, National Research Center, Dokki, Giza, Egypt
*Physics Department, Faculty of Science, Mansoura University, Egypt

Keywords PVDF, composites, FTIR, XRD, DTA, magnetoresistance
PACS 77.22.-d
DOI 10.1002/crat.200610789

Poly(vinylidene fluoride) (PVDF) and LaNi3Co2 were composites in various combinations by using melting technique. Morphological and physical properties of both the surface and interface of poly(vinylidene fluoride)/ LaNi3Co2 composite films have been investigated. FTIR and XRD diffraction analysis evidenced the increase of α, β and γ- PVDF crystalline phases. The bands at 888 and 1414 cm-1 were assigned to γ– phase of PVDF. Maximum value of the relative amount of β-phase was observed at 35 and 60 % FL. This result was confirmed by X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis. Maximum value of degree of crystallinity was observed at 15% Filling level (FL). Morphology of SEM consists of two different size rings and spherulites. DSC was used to identify the melting temperature, the order of reaction and the activation energy of melting. A sharp endothermic peak at 444 K due to melting and 360 K due to α-relaxation/transition. Maximum values of magnetoresistance (MR) observed from range (243 to 238K) are due to reorientation of dipoles in a process associated with the glass transition temperature of PVDF.




The full text of this paper in pdf-Format:

If you have come directly to this page, click this symbol to go to the CRT homepage.