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Formula: PES

Form: Granule

Material: Polyethersulfone (PES)

Commodity: Polymers

Nominal Granule Size: 3mm

Molecular Weight: 58,000 g/mol

Viscosity: Medium Viscosity

Melt Volume Rate: 35 (360°C/10 Kg), cc/10min

Color: Clear Amber

PES Granules

PES (Polyethersulfone) Granules provide high thermal resistance, dimensional stability, and chemical compatibility, making them suitable for producing membranes used in microfiltration, gas separation, and protein concentration. In research and laboratory environments, they are processed into components for sample preparation, analytical devices, and biopharmaceutical filtration systems. PES is compatible with steam sterilization, gamma radiation, and aggressive cleaning agents, supporting repeated use in controlled environments. Its performance in medical diagnostics, water purification, and polymer-based device prototyping has made it a preferred material in R&D and pilot-scale production. The granules can be precisely molded or extruded for membrane casting or component fabrication.

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Properties

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Material Properties for Polymers

Chemical Resistance

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

Electrical Properties

Element	Value
Dielectric constant @1MHz	3.7
Dissipation factor @ 1MHz	0.003
Dielectric strength( kV mm⁻¹ )	16
Volume resistivity( Ohmcm )	10¹⁷

Physical Properties

Element	Value
Flammability	V-0 @ 0.4mm
Radiation resistance	Good-Fair
Refractive index	1.65
Resistance to Ultra-violet	Fair
Limiting oxygen index( % )	34-41
Water absorption - equilibrium( % )	2.2
Water absorption - over 24 hours( % )	0.4-1
Density( gcm⁻³ )	1.37

Mechanical Properties

Element	Value
Hardness - Rockwell	M88
Poisson's ratio	0.4
Elongation at break( % )	40-80
Tensile modulus( GPa )	2.4-2.6
Izod impact strength( J m⁻¹ )	85
Abrasive resistance - ASTM D1044( mg/1000 cycles )	6
Tensile strength( MPa )	70-95

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	260
Heat-deflection temperature - 1.8MPa( C )	203
Lower working temperature( C )	-110
Upper working temperature( C )	180-220
Thermal conductivity( W m⁻¹ K⁻¹ )	0.13-0.18@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	55