β phase instability in poly(vinylidene fluoride/trifluoroethylene) thin films near β relaxation temperature

Journal Article · Mon Mar 02 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4913968· OSTI ID:22412763

Tian, B. B. ^[1]; Bai, X. F.; Liu, Y.; Gemeiner, P.; Zhao, X. L.; Liu, B. L.; Zou, Y. H.; Huang, H.; Sun, Sh.; Sun, J. L.; Meng, X. J.; Chu, J. H. ^[1]; Wang, X. D. ^[1]

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1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Yu Tian Road 500, Shanghai 200083 (China)

The β phase stability in poly(vinylidene fluoride/trifluoroethylene) [P(VDF-TrFE)] thin films was studied below 300 K using X-ray diffraction and polarization-electric-field (P-E) hysteresis loops measurements. On as-grown samples, an irreversible partial order-disorder transformation at T{sub β} ∼ 250 K, namely, the β relaxation temperature, was evidenced by the appearance of an additional X-Ray diffraction peak above T{sub β} as well as changes on the P-E loops on heating after the first cooling. This order-disorder-like transformation which is attributed to an all-trans order to helical disorder transition is suggested to take place in defect-rich regions like crystal-amorphous interphases and/or crystalline areas with randomly distributed TrFE defect-like units.

• OSTI ID: 22412763
• Journal Information: Applied Physics Letters, Vol. 106, Issue 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COOLING
CRYSTALS
ELECTRIC FIELDS
FLUORINATED ALIPHATIC HYDROCARBONS
HYSTERESIS
ORDER-DISORDER TRANSFORMATIONS
PHASE STABILITY
POLARIZATION
POLYVINYLS
RELAXATION
TEMPERATURE DEPENDENCE
THIN FILMS
X-RAY DIFFRACTION