Thermal characterization of a series of poly(vinylidenefluoride–chlorotrifluoroethylene–trifluoroethylene) terpolymer films

摘要: A number of solution-casted poly(vinylidenefluoride–chlorotrifluoroethylene–trifluoroethylene) [P(VDF–CTFE–TrFE)] terpolymer films with different CTFE content have been characterized by a series thermal analysis techniques, including thermogravimetric (TG), differential scanning calorimetry, dynamic mechanical (DMA) and (TMA). The work intends to provide more comprehensive information about behavior these ferroelectric polymers. TG results suggest that the introduction units slightly decreases stability polymer due instability C–Cl bond during heating. DMA detected relatively weak αa relaxation broad αc in samples low content. These two processes completely mixed together sample high content, revealing crystalline structures polymer, become imperfect diffuse state as increasing. less possesses an enhanced stiffness its higher degree crystallinity. contraction process after slight amount expansion upon heating is TMA, release internal tensile strain/stress generated solidification films. crystallinity film greater strain/stress, leading larger shrinkage. Also, melting point allows soften at temperature.