Polyvinylidene fluoride and its copolymers are well known piezoelectric polymers. Besides these a variety of piezoelectric polymers are investigated. An automatic recording apparatus to the advanced elastic, dielectric and piezoelectric constants like a purpose of frequency and temperature is easily the most famous. It was commercialized by an organization http://andersonhvhrf.blog-gold.com/8913097/fukada-no-further-a-mystery