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Spectroscopic and thermal investigations of poly(vinylidene fluoride) films composites with LaNi 3 Co 2
Author(s) -
Elashmawi I. S.,
Elsheshtawi N. A.,
Abdelkader H. I.,
Hakeem N. A.
Publication year - 2007
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200610789
Subject(s) - crystallinity , materials science , differential scanning calorimetry , fluoride , glass transition , composite material , fourier transform infrared spectroscopy , phase (matter) , endothermic process , melting point , analytical chemistry (journal) , polymer chemistry , chemical engineering , polymer , chemistry , thermodynamics , organic chemistry , inorganic chemistry , physics , adsorption , engineering
Poly(vinylidene fluoride) (PVDF) and LaNi 3 Co 2 were composites in various combinations by using melting technique. Morphological and physical properties of both the surface and interface of poly(vinylidene fluoride)/ LaNi 3 Co 2 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 T m ≈ 444 K due to melting and T 2 ≈ 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. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)