High-pressure Raman spectroscopy and X-ray diffraction studies of a terpolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride: THV 500.
High-pressure Raman spectroscopy and X-ray diffraction of THV 500, a terpolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride, were performed using diamond anvil cells (DAC). Changes in the interatomic spacing as well as shifts of several of the vibrational bands as a function of pressure were measured up to approximately 10 GPa. The changes in interatomic spacing and shifts of the vibrational bands are compared to those of polytetrafluoroethylene, showing the effects of copolymerization and reduced crystallinity. The high-pressure behavior of polymers is a relatively unexplored field but is becoming increasingly important due to applications where polymers experience extreme conditions.
Emmons
E D
ED
Dynamic and Energetic Materials Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Velisavljevic
N
N
Schoonover
J R
JR
Dattelbaum
D M
DM