The Dielectric Properties and the Molecular Motion of Poly (Vinylidene Fluoride)

Electromechanical Properties of Poly(vinylidene fluoride- trifluoroethylene) Networks

Random copolymers of 65% vinylidene fluoride and 35% trifluoroethylene were reacted with an organic peroxide, in combination with a free-radical trap, to yield networks of high crosslink density. Crystallization subsequent to the crosslinking yielded ferroelectric materials exhibiting large electrostrictive strains. The magnitude of the electromechanical response increased with an increasing de...

Performance of Chemically Modified TiO2-poly (vinylidene fluoride) DCMD for Nutrient Isolation and Its Antifouling Properties

The surface properties of TiO2-PVDF nanocomposite membranes were investigated by incorporating different chemically modified TiO2 nanoparticles into the poly (vinylidene fluoride) (PVDF) matrix. The nanocomposite membranes were prepared via dual coagulation bath diffusion and the induced phase inversion method. The membrane surface morphologies were investigated by using SEM and AFM and related...

The Effect of Frequency and Temperature on Dielectric Properties of Pure Poly Vinylidene Fluoride ( PVDF ) Thin Films

In this work we have evaluated the dielectric properties of poly vinylidene fluoride (PVDF) thin films of thickness (≈ 20μm) as a function of temperature from 40-70C and frequency varying from 500 Hz to 100 kHz respectively for Al-Al and Cu-Cu electrode configuration. The dielectric constant values increases with the increase in temperature. A broad peak is found at around (70±5)0C. The maximum...

Density Functional Theory calculations of the ferroelectric poly(vinylidene fluoride- chlorotrifluoroethylene) copolymer, compared to those of poly(vinylidene fluoride)

The quantum mechanics calculations of the energetics and structures corresponding to the different representatives structural conformations of poly(vinylidene fluoridetrifluoroethylene) and poly(vinylidene fluoridechlorotrifluoroethylene) copolymers show that the all-trans, Tp conformation, is energetically stabilized even with a chlorine substituent. The changes in the molecular arrangement as...

Quantum Modelling of Poly(vinylidene Fluoride)