Articles written in Bulletin of Materials Science

    • Study of $\beta$-phase development in spin-coated PVDF thick films


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      A study was conducted to ascertain the effect of variation in spin speed and baking temperature on $\beta$-phase content in the spin-coated poly(vinylidene fluoride) (PVDF) thick films ($\sim$4−25 $\mu$m). Development of $\beta$-phase is dependent on film stretching and crystallization temperature. Therefore, to study the development of $\beta$-phase in films, stretching is achieved by spinning and crystallization temperature is adjusted by means of baking. PVDF films are characterized using Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, and scanning electronmicroscopy. It is observed that crystallization temperature lower than 60$^{\circ}$C and increase in spin speed increases the $\beta$-phasecontent in PVDF films. Crystallization temperature above 60$^{\circ}$C reduces $\beta$-phase content and increases α-phase content. It was also observed that viscosity of the PVDF solution affects the β-phase development in films at a particular spin speed.

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