Poly(vinylidene fluoride)/poly(ethylene-co-vinyl acetate) (20/80) blend. I. Miscibility and crystallization behavior |
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| Authors: | Jong Soon Lee Kap Jin Kim |
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| Institution: | (1) Department of Advanced Polymer and Fiber Materials, College of Environment and Applied Chemistry, Kyung Hee University, 449-701 Gyeonggi-do, Korea;(2) Material Analysis Team, Central Research Institute, Hyosung Corporation, 431-080 Gyeonggi-do, Korea |
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| Abstract: | The miscibility and crystallization behavior of the blends of poly(vinylidene fluoride) (PVDF) and ethylene/vinyl acetate(20/80)
copolymer (EVAc80) have been studied using a differential scanning calorimeter and a polarizing microscope equipped with a
heating stage. From the melting point depression, the values of interaction energy densityB were calculated to be −1.3004 (cal/cm3) and the Flory-Huggins interaction parameterχ
12 was found to be −0.0818 at 445.6 K. With increasing concentration of EVAc80, the radial growth rate of spherulite was reduced
drastically. The FT-IR analysis of samples quenched from the melt to various temperatures showed increasing content ofβ-phase with increasing amount of blended EVA80 along with lower quenching temperature. |
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| Keywords: | PVDF/EVA80 blend Miscibility Radial growth rate of spherulite β -crystal phase |
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