Thermodynamic and morphological studies of the solid‐state transition in copolymers of vinylidene fluoride and trifluoroethylene
作者:
G. M. Stack,
R. Y. Ting,
期刊:
Journal of Polymer Science Part B: Polymer Physics
(WILEY Available online 1988)
卷期:
Volume 26,
issue 1
页码: 55-64
ISSN:0887-6266
年代: 1988
DOI:10.1002/polb.1988.090260102
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractCopolymers of vinylidene fluoride and trifluroethylene are presently being considered for many piezoelectric applications. In contrast to the poly(vinylidene fluoride) homopolymer, a transition from the room temperature ferroelectric phase to a paraelectric phase has been observed in these copolymers. The temperature of this transition was determined by measuring the position of the endothermic peak observed in the differential scanning calorimeter. The rate of cooling from the paraelectric to ferroelectric phase was found to affect the temperature at which the transition occurred on subsequent heating. Changing the conditions under which molten polymer initially crystallized into the paraelectric phase had an even greater effect on the resultant transition temperature. In addition to the DSC studies, wide‐angle x‐ray measurements were performed on samples subjected to different thermal treatments. No significant differences were found in the x‐ray scans of these copol
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