Electrical Property

Electrical Properties of Fluoropolymers

Fluoropolymers, known for their outstanding chemical resistance and thermal stability, exhibit intriguing electrical characteristics that set them apart from other polymers. The presence of fluorine atoms in the polymer chain imparts several beneficial properties, such as high insulation capabilities and low dielectric constant. These qualities make fluoropolymers a preferred choice in various industries, including electronics, telecommunications, aerospace, and automotive.

Electrical Conductivity

One of the notable features of fluoropolymers is their inherent low electrical conductivity. Fluoropolymers, like polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF), possess high molecular chains with tightly bound electron orbitals, resulting in limited mobility of charge carriers. Consequently, fluoropolymers exhibit excellent electrical insulation properties, making them ideal for applications that require non-conductive materials. They have high resistivity, making them useful for insulating wires and cables, as well as in the construction of electronic components to prevent unintended current flow.

Dielectric Properties

• Low Dielectric Constant
  The dielectric properties of fluoropolymers play a vital role in determining their electrical behavior. Fluoropolymers possess a low dielectric constant, which refers to the ability of a material to store electrical energy when subjected to an electric field. The low dielectric constant of fluoropolymers allows for efficient transmission of electrical signals while minimizing losses due to energy dissipation.
• High Dielectric Strength
  Fluoropolymers possess high dielectric strength, which is the ability to withstand electrical voltage without breaking down or causing electrical breakdown. This property is particularly important in high voltage applications, as it ensures the insulation remains intact even under extreme electrical stress.

Comparison of Electrical Properties

Properties	ASTM	PTFE	PFA	FEP	ETFE	PCTFE	PVDF
Dielectric constant	D150/106Hz	2.1	2.1	2.1	2.6	2.4	6.43
Electrical breakdown strength	D149/short time, 3.2mm	19	20	20~24	16	20~24	10
Volume resistivity (Ω*cm)	D257 (23℃, 50% RH)	>1018	>1018	>1018	>1018	>1015	>1015