Influence of the conditions and period of storage on the electron pragmatic resonance signal strength of the chemically dehydroflouride derivants of the polyvinylidene fluoride

The authors present the analysis results of the influence of the conditions and period of storage on the electron pragmatic resonance (EPR) signal strength of the chemically dehydrofluoride derivants of the polyvinylidene fluoride during different periods of time. Usually the EPR absorption decreases on storage. Nonmonotonic signal intensity change for a sample with the chemical treatment duration of 12 hours storing on low pressure is an exception here. It decreases during first two days of storage and increases when further storage meanwhile the increase is more intensive than the preceding decrease. The signal intensity increases with sample vacuum blowing.