Accession Number : ADA292298

Title :   High Field Electrostrictive Response of Polymers.

Descriptive Note : Technical rept. 1 Jun 93-31 May 94,

Corporate Author : RUTGERS - THE STATE UNIV PISCATAWAY NJ COLL OF ENGINEERING

Personal Author(s) : Zhenyl, Ma ; Scheinbeim, Jerry I. ; Lee, Jar Wha ; Newman, Brian A.

PDF Url : ADA292298

Report Date : AUG 1994

Pagination or Media Count : 13

Abstract : It is well known that electrostrictive strains are proportional to the square of the applied electric field. It therefore appeared reasonable to assume that for some polymeric materials, a large acoustic thickness response might be obtained by application of high dc bias fields, approx. 20 MV/rn, to a film while driving the film with an ac signal to access the high slope region of the electrostrictive strain vs. applied field curve. Previous studies of crystallizing poly(vinylidene fluoride) (PVF2) from solution under high electric fields have demonstrated that gel-like samples of PVF2 with high content of the plasticizer tricresyl phosphate (TCP) could he subjected to electric fields as high as approx. 100 MV/m. Using this type of heavily plasticized PVF2, d sub T values approx. 4 Angstrom/V were obtained. Values of 9 Angstrom/V were obtained for a certain class of thermoplastic elastomer (i.e., a polyurethane). These d sub T values are considerably greater than those obtained from conventional piezoelectric ceramic materials. In addition, large elastic strains (> 3%) were observed as a function of applied dc field. (MM)

Descriptors :   *POLYMERS, *ELASTOMERS, *POLYMERIC FILMS, *THERMOPLASTIC RESINS, *ELECTROSTRICTION, THICKNESS, ELASTIC PROPERTIES, VOLTAGE, ELECTRIC FIELDS, STRAIN(MECHANICS), LASER BEAMS, POLYURETHANE RESINS, ACOUSTIC PROPERTIES, PLASTICIZERS.

Subject Categories : Plastics
      Elastomers and Rubber
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE