Analysis of the alignment and crystallinity of bulk polyvinylidene fluoride (PVDF) / Nurul Redzuan Mansor

The analysis of the alignment and crystallinity of bulk polyvinylidene fluoride (PVDF) was studied. The alignment and orientation of the crystallization were observed by stretching at speed of 5mm/min, lOmm/min, 30mm/min, 40mm/min and 50mm/min. The variation of speed of pulling is to enhance the orientation of the crystals. The samples were observed under the polarized light optical microscopy (PLOM) at 5x, lOx, 20x and 50x magnification. The samples were then annealed at temperature 120°C. The sample was reobserved under PLOM. The stretching was caused a reduction in the sample thickness and resulted in the alignment of the crystals. The speed of pulling at 30mm/min was found to be a favourable because of their clear alignment of the crystals.