X-Ray High Pressure Study of Polyvinylidene Fluoride.

摘要

An x-ray high pressure study at room temperature of both phase I and phase II crystal structures of polyvinylidene fluoride has been carried out. At room temperature both phases are stable up to pressures greater than 14 kbars. The variation of lattice compressive strains with pressure could be fitted to the Tait equation with little scatter and the variation of the unit cell parameters with pressure computed. The bulk lattice compressibilities of both phase I and phase II was found to be considerably less than that of polyethylene with the lowest compressibility being found for the phase I structure.