Hydrostatic pressure studies of polyvinylidine fluoride (PVDF) and its copolymers

Conference · Wed Dec 31 23:00:00 EST 1986

OSTI ID:6324130

Samara, G A; Bauer, F

The frequency, temperature and hydrostatic pressure (less than or equal to10 kbar) dependences of the dielectric properties, molecular relaxations and phase transitions in PVDF and a copolymer with a 30% trifluorethylene were investigated. For the copolymer, both the ferroelectric transition (T/sub c/) and dynamic melting (T/sub m/) temperatures exhibit large increases with pressure. PVDF itself does not exhibit a T/sub c/ below T/sub m/, but its T/sub m/ also shows a large increase with pressure. The pressure and frequency dependences suggest an explanation for why it is possible to use these polymers as piezoelectric shock wave gauges to relatively high shock pressures.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Institut Franco-Allemand de Recherches de Saint-Louis, 68 (France)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6324130
• Report Number(s): SAND-87-0933C; CONF-870753-17; ON: DE87012136
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COPOLYMERS
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
FERROELECTRIC MATERIALS
MELTING POINTS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POLYMERS
PRESSURE EFFECTS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VERY HIGH PRESSURE