Raman microspectroscopy was used to follow the crystalline phase transformation produced when Knoop and Vickers microindentations are made in poly(vinylidene fluoride). An evolution of the degree of crystalline phase transformation was observed along the microindentations which can be schematized into three regions. A high gradient in the degree of crystalline transformation was detected near the centre of the indentation, whereas Raman microanalysis of the region near the edges of the impression did not indicate a significant variation in the crystalline phase modification. An explanation for these observations is proposed.
Посилання на статтю:
Raman mapping of the microdeformed zone produced by Vickers and Knoop microindentation techniques in poly(vinylidene fluoride) / T. Jawhari, J. C. Merino, J. C. Rodriguez-Cabello and J. M. Pastor // Polymer. – 1993. – Vol 34. – P. 1613-1619.