PPO Film

PPO Film is a thin layer of polyphenylene oxide, a high-performance engineering thermoplastic valued for its dimensional stability, high glass transition temperature, and low moisture absorption. Supplied as film, it is used in electronics, membranes, and specialty coatings. Industries including electrical engineering, water purification, and aerospace employ PPO films in capacitor dielectrics, semipermeable membranes, and lightweight insulating laminates. Specific applications include dielectric substrates in printed circuits, membranes for desalination, and protective coatings in aerospace structures. In research, PPO films are studied for their dielectric constant, oxidation resistance, and role in polymer blends with polystyrene and other engineering plastics. Their balance of thermal stability, electrical insulation, and resistance to hydrolysis makes PPO films indispensable for both advanced engineering and materials science research.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil/Film/Sheet

Thickness		±20%

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Good-Fair
Acids - dilute	Good
Alcohols	Good
Alkalis	Good
Aromatic hydrocarbons	Poor
Greases and Oils	Good-Poor
Halogenated Hydrocarbons	Fair-Poor
Halogens	Poor
Ketones	Poor

Mechanical Properties

Element	Value
Coefficient of friction	0.35
Hardness - Rockwell	M78/R115
Poisson's ratio	0.38
Elongation at break( % )	50
Tensile modulus( GPa )	2.5
Izod impact strength( J m⁻¹ )	200
Abrasive resistance - ASTM D1044( mg/1000 cycles )	20
Tensile strength( MPa )	55-65

Electrical Properties

Element	Value
Dielectric constant @1MHz	2.7
Dissipation factor @ 1kHz	0.004
Dielectric strength( kV mm⁻¹ )	16-20
Surface resistivity( Ohm/sq )	2x10¹⁶
Volume resistivity( Ohmcm )	10¹⁷

Physical Properties

Element	Value
Flammability	HB
Radiation resistance	Good
Limiting oxygen index( % )	20
Water absorption - over 24 hours( % )	0.1-0.5
Density( gcm⁻³ )	1.06

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	137
Heat-deflection temperature - 1.8MPa( C )	125
Lower working temperature( C )	-40
Upper working temperature( C )	80-120
Thermal conductivity( W m⁻¹ K⁻¹ )	0.22@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	60