Induced formation of polar phases in poly(vinylidene fluoride) by cetyl trimethyl ammonium bromide
Source abstract
Abstract
Poly(vinylidene fluoride) (PVDF) has been widely used as transducers, actuators,and sensors due to its exceptional electroactive properties among polymer materials and the electroactive properties of PVDF heavily depend on its polymorphs. The effects of cetyl trimethyl ammonium bromide (CTAB) on the crystallization behavior of PVDF during isothermal crystallization and annealing process were studied, and the results showed that the polar phases (β, γ) were induced by CTAB when PVDF was isothermally crystallized at 145–160 °C. Increasing the isothermal crystallization temperature resulted in an increased γ-phase formation with a concomitant decrease of α and β phases. A 100 % γ-phase formation occurred when the sample isothermally crystallized at 155 and 160 °C. The crystalline phase transition of the sample annealed at 160 °C for various time revealed that CTAB induced the transformation from α to γ′ phase and a higher concentration of CTAB resulted in shorter transformation time, as well as higher transformation degree.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Dielectric materials and actuators · Polymer Nanocomposites and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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