Science and Technology of Energetic Materials

Vol.62, No.4 (2001)

Research paper

Development of pressure sensors using fluoropolymer for underwater shock wave measurements (II)
- Relationship between molecular structure of fluoropolymers and performance of pressure sensors -(*in Japanese)
Kenji Murata, Katsuhiko Takahashi, Yukio Kato, and Koichi Murai


To study the relation between the properties of fluoropolymer such as chemical formation, physical properties, size, infrared spectra analysis, X - ray diffraction analysis and its performance as sensing element of pressure sensor, three types of pressure sensor were developed using polyvinylidenefluoride and two types of vinylidenenuorode - trifluoroethylene copolymer as sensing element. Durability tests and underwater shock wave measurements were performed using three types of pressure sensors. The results of durability tests show that fluoropolymer sheet of 50 µm thickness has the best durability independent of the type of fluoropolymer used. The results of X - ray diffraction analysis show that one type of vinylidenefluoride - trifluoroethylene copolymer has higher crystallization ratio. It is shown that fluoropolymer with higher crystallization ratio has good performance as sensing elements of pressure sensor to measure underwater shock wave.

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