[TR-FTIRS study of crystal phase transformation in polyvinylidene fluoride].
The study of polyvinylidene fluoride (PVDF) by time-resolved Fourier transform infrared spectroscopy (TR-FTIRS) was reported. The instantaneous change and process of both alpha-form and beta-form during transformation were studied under the pulse electric field excitation. Transformation of alpha-form to beta-form was indicated by the increasing of the peak at 508cm(-1), the decreasing of the peak at 528cm(-1) and a shift of those peaks. The transient change time was about 5ms. The decreasing of the peak at 528cm(-1) was nonlinear. A hysteresis-like loop was observed, which was related with the biaxially orientated property of PVDF and was in good agreement with its polarizated hysteresis loop.
Hu
X
X
Department of Chemistry, Tsinghua University, 100084 Beijing.
Li
Y
Y
Lu
W
W
Sun
S
S