Relationship between processing conditions, defects and thermal degradation of poly(vinylidene fluoride) in the β-phase

摘要: Abstract Poly(vinylidene fluoride), PVDF, in its β-phase is an electroactive polymer with many technological applications. There are two main ways to prepare this β-phase: by high temperature stretching from the α-phase and directly solution. In paper, influence of processing methods thermal stability samples was studied UV–VIS spectroscopy thermogravimetric analysis. The number chain defects measured 1 H NMR. results obtained were compared a commercial β-PVDF sample. head different found be between 6% 9%. onset for degradation average activation energy (∼76.5 kJ mol −1 ) process approximately equal sample it. Larger values (∼100 kJ mol solution occurs steps, independently phase sample, degree crystallinity method.