Dynamically cured poly(vinylidene fluoride)/epoxidized natural rubber blends filled with ferroelectric ceramic barium titanate

2017 ◽  
Vol 93 ◽  
pp. 107-116 ◽  
Author(s):  
Subhan Salaeh ◽  
Gisèle Boiteux ◽  
Philippe Cassagnau ◽  
Charoen Nakason
Keyword(s):  
Barium Titanate ◽  
Natural Rubber ◽  
Vinylidene Fluoride ◽  
Ferroelectric Ceramic ◽  
Epoxidized Natural Rubber ◽  
Rubber Blends ◽  
Poly Vinylidene Fluoride

scholarly journals Interface-Dominated Time-Dependent Behavior of Poled Poly(Vinylidene Fluoride–Trifluoroethylene)/Barium Titanate Composites

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 225 ◽  
Author(s):  
Sara Dalle Vacche ◽  
Dragan Damjanovic ◽  
Véronique Michaud ◽  
Yves Leterrier
Keyword(s):  
Barium Titanate ◽  
Vinylidene Fluoride ◽  
Particle Surface ◽  
Charge Trapping ◽  
High Volume ◽  
Ferroelectric Ceramic ◽  
Particle Dispersion ◽  
Polymer Particle ◽  
Ceramic Phase ◽  
Poly Vinylidene Fluoride

Composites in which particles of ferroelectric ceramic phase are randomly dispersed in a polymeric matrix are of interest because of flexibility, conformability, and ease of processing. However, their piezoelectric properties are rather low, unless very high volume fractions of ceramics are used. This brings agglomeration and porosity issues due to the large mismatch between the surface energies of the ceramics and of the polymer. Particle surface modification is a common approach for better dispersion; however, it may bring other effects on the properties of the composites, which are usually concealed by the huge improvement in performance due to the more homogenous microstructure. In this work, we compared poly(vinylidene fluoride–trifluoroethylene)/barium titanate composites containing 15 vol.% and 60 vol.% of pristine ceramic particles or particles modified with an aminosilane or a fluorosilane. Similar morphology, with good particle dispersion and low porosity, was achieved for all composites, owing to an efficient dispersion method. The materials were poled with two different poling procedures, and the piezoelectric coefficient d33, the relative permittivity, and the poling degree of barium titanate were followed in time. We highlighted that, although similar d33 were obtained with all types of particles, the nature of the particles surface and the poling procedure were associated with different charge trapping and influenced the evolution of d33 with time.

Dynamic Mechanical and Dielectric Properties of Poly(vinylidene fluoride) and Epoxidized Natural Rubber Blends

2013 ◽  
Vol 844 ◽  
pp. 97-100 ◽  
Author(s):  
Subhan Salaeh ◽  
Gisèle Boiteux ◽  
Olivier Gain ◽  
Philippe Cassagnau ◽  
Charoen Nakason
Keyword(s):  
Natural Rubber ◽  
Storage Modulus ◽  
Vinylidene Fluoride ◽  
Crystalline Polymer ◽  
Mechanical Analysis ◽  
Epoxidized Natural Rubber ◽  
Melt Mixing ◽  
Neat Polymer ◽  
Dynamic Mechanical ◽  
Poly Vinylidene Fluoride

The blending of semi-crystalline polymer, poly (vinylidene fluoride), (PVDF) and uncross-linked elastomer epoxidized natural rubber with 50 mol% epoxide (ENR-50) blends were prepared in an internal mixer by melt mixing process. Dynamic mechanical analysis (DMA) and dielectric analysis (DEA) of PVDF/ENR-50 blends were investigated. It was found that the pure PVDF showed higher storage modulus than that of the pure ENR-50 and storage modulus of the PVDF/ENR blends decrease with increasing ENR-50 content. Furthermore, PVDF showed two relaxation peaks correspond to αa-relaxation and αc-relaxation, while ENR-50 showed only a single relaxation that is related to α-relaxation or glass transition temperature (Tg). Two relaxation peaks were observed in the PVDF/ENR-50 blends due to phase separation. However, the maximum peak of relaxation shifted toward to higher and lower temperature compared with the pure components which indicates the partial miscible blends. Moreover, at high temperature, the neat polymer and blends showed a sharp increase of loss factor (ε) that correspond to conductivity and/or Maxwell-Wagner-Sillar (MWS) process.

Co-Continuous Phase Structure and Properties of Poly(vinylidene Fluoride)/Epoxidized Natural Rubber Blends

2012 ◽  
Vol 626 ◽  
pp. 71-74 ◽  
Author(s):  
Subhan Salaeh ◽  
Charoen Nakason ◽  
Gisèle Boiteux ◽  
Philippe Cassagnau
Keyword(s):  
Dielectric Properties ◽  
Natural Rubber ◽  
Phase Structure ◽  
Vinylidene Fluoride ◽  
Grain Morphology ◽  
Continuous Phase ◽  
Epoxidized Natural Rubber ◽  
Morphological Properties ◽  
Blending Method ◽  
Poly Vinylidene Fluoride

Thermoplastic elastomer based on poly (vinylidene fluoride) (PVDF) and epoxidized natural rubber (ENR) blends at 50/50 by weight with different type of ENR (i.e., ENR with 25 and 50 mol% epoxide which are called as ENR-25 and ENR-50, respectively) has been prepared by melt blending method. Difference content of epoxide groups in ENR molecules on dynamic mechanical properties, dielectric properties and morphological properties of blends were investigated. The morphology reveals the co-continuous phase structure of PVDF and ENR phases. Furthermore, ENR-50/PVDF blend showed finer grain morphology and the glass transition (Tg) of the rubber phase was shifted to lower temperature. The structure of the blends correlated well with permittivity (ε) in dielectric properties with the permittivity of PVDF/ENR-50 higher than that of PVDF/ENR-25.

scholarly journals 3D-printed barium titanate/poly-(vinylidene fluoride) nano-hybrids with anisotropic dielectric properties

2017 ◽  
Vol 5 (47) ◽  
pp. 12430-12440 ◽  
Author(s):  
N. Phatharapeetranun ◽  
B. Ksapabutr ◽  
D. Marani ◽  
J. R. Bowen ◽  
V. Esposito
Keyword(s):  
Dielectric Properties ◽  
Barium Titanate ◽  
Vinylidene Fluoride ◽  
Anisotropic Dielectric ◽  
Poly Vinylidene Fluoride ◽  
3D Printed ◽  
Dielectric Devices

“3D-printed” anisotropy BTNFs/PVDF nanohybrids are successfully fabricated by the FDM technique which is attractive for developing novel functionalities in dielectric devices.

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