Effect of the compatibility on dielectric performance and breakdown strength of poly(vinylidene fluoride)/low‐density polyethylene blends

Abstract

Immiscible polymer blends with high dielectric constant (e) and improved breakdown strength (E b ) performance were obtained by composing poly(vinylidene fluoride) (PVDF) with low-density polyethylene (LDPE) or the LDPE grafted with maleic anhydride (LDPE-g-MAH) through melt-blending way. The dielectric properties of these blends were emphasized for considering the compatibility effect on the energy storage application. Interface morphology, co-continuity behavior, and grafted ratio were simultaneously investigated to detect the compatibility enhancement after introducing MAH. Results showed that the MAH positively improved the dielectric properties. Both the measured E b of PVDF/LDPE and PVDF/LDPE-g-MAH blends showed a minimum value at v PVDF 5 50 vol % because of the worst compatibility; meanwhile, higher E b of PVDF/LDPE-g-MAH than that of PVDF/LDPE blend was observed owing to the better compatibility. For considering the effect interface morphology on the dielectric performance, layerstructure films composing with pure PVDF and LDPE layers were further constructed and studied. It was revealed that the layered structure could be treated as a helpful way to improve e and E b for immiscible polymer blends.

Conductive poly(vinylidene fluoride)/polyethylene/graphene blend‐nanocomposites: Relationship between rheology, morphology, and electrical conductivity

“…However, high cost and low production volume of this polymer are its drawbacks. Blending of the PVDF with a suitable polymer such as PE can be an effective strategy to overcome these drawbacks . The blends of PVDF/PE and particularly their conductive nanocomposites could find interesting applications in micro‐electromechanical devices and high‐charge storage capacitors, as stated in our previous work .…”

“…studied the rheology and morphology of PVDF/LDPE blends and reported that the 50/50 composition exhibited co‐continuous morphology. Lin et al . showed that the interfacial interaction between the PVDF and LDPE phases and consequently the electrical properties of their blends improved in the presence of maleic anhydride grafted low density polyethylene (LDPE‐ g ‐MA) as an interfacial agent.…”

Influence of Ungrafted Monomers in Graft Copolymers on Electrical Insulating Properties of Polyethylene

“…The results showed that the DC breakdown strength of LLDPE- g -AAP is 68.8% higher than that of pure LLDPE. In addition, the obtained graft copolymers with polar groups, such as LDPE- g -MAH and polystyrene- b -poly­(ethylene- co -butylene)- b -polystyrene-grafted maleic anhydride (SEBS-MAH), , are widely used as compatibilizers to improve the compatibility of blends and/or improve the dispersion of nanoparticles in nanocomposite insulating materials. It was reported that ZnO nanoparticles show better dispersion in HDPE/SEBS-MAH/ZnO due to improved compatibility between SEBS-MAH and nanoparticles .…”

Functionalization of silica nanoparticles to reduce membrane swelling in CO2 absorption process

“…Sedghi et al 41 found that prolonged LDPE contact to amine led to degradation and a decrease in hydrophobicity of hollow fibres, a similar observation for the neat PVDF membrane in the present work. Integrating silica nanoparticles in this work could improve the compatibility between PVDF and LDPE, 43 subsequently augmenting the adhesion of LDPE to the membrane. Thus, the wetting resistance was retained better than in the neat membrane.…”