Polyetherketoneketone (PEKK)

Alternative and trade names
Gapekk™, Kepstan®

Want to keep this datasheet? Save it now in your required format

Description

PEKK (polyether-ketone-ketone) resins are made from a tailored combination of two monomers (terephthaloyl and isophthaloyl moieties on the left and right, respectively). Its key features include:

Outstanding high temperature performance - continuous use temperature 250 – 260°C, short term exposure up to 300°C

Very high stiffness, tensile & compressive strength, impact resistance

Excellent combustion resistance properties - inherently flame retardant, low level of smoke generation

Low smoke toxicity

Resistant to virtually all organic and inorganic chemicals (only sensitive to very agressive reagents like fuming sulfuric and nitric acid, methylene chloride)

High dielectric strength - good insulating properties

High breakdown voltage

Tremendous barrier properties (CO2, H2S...etc.)

Outstanding control of wear-rate and COF (coefficient of friction)

This material data has been provided by M-Base.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

See where falls on the material property chart for against in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.

All categories

Properties

General

Property	Value
Density	1.28 - 1.31 g/cm³ Show Material materials with Density of 1.28 - 1.31 g/cm³

Mechanical

Property	Value	Comment
Elastic modulus	3.5 - 4.5 GPa Show Material materials with Elastic modulus of 3.5 - 4.5 GPa
Elongation	12.0 - 80.0 % Show Material materials with Elongation of 12.0 - 80.0 %
Impact strength, Charpy notched	4.0 - 5.0 kJ/m² Show Material materials with Impact strength, Charpy notched of 4.0 - 5.0 kJ/m²
Impact strength, Charpy unnotched	60 kJ/m² Show Material materials with Impact strength, Charpy unnotched of 60 kJ/m²
Tensile strength	100.0 - 140.0 MPa Show Material materials with Tensile strength of 100.0 - 140.0 MPa	at 4-6% strain

Thermal

Property	Value
Coefficient of thermal expansion	2e-05 - 3e-05 1/K Show Material materials with Coefficient of thermal expansion of 2e-05 - 3e-05 1/K
Melting point	360.0 - 395.0 °C Show Material materials with Melting point of 360.0 - 395.0 °C
Specific heat capacity	1000.0 - 1020.0 J/(kg·K) Show Material materials with Specific heat capacity of 1000.0 - 1020.0 J/(kg·K)
Thermal conductivity	0.24 W/(m·K) Show Material materials with Thermal conductivity of 0.24 W/(m·K)
Flammability	UL 94 V0

Electrical

Property	Value
Dielectric constant	2.5 [-] Show Material materials with Dielectric constant of 2.5 [-]
	3.6 [-] Show Material materials with Dielectric constant of 3.6 [-]
Electrical resistivity	100000000000000 Ω·m Show Material materials with Electrical resistivity of 100000000000000 Ω·m

Optical

Property	Value
Transparency	no

Technological properties

Property

Application areas

Gears, conveyor elements, bearings, seals

Other

You are viewing a generic polymer page, for more information please contact the suppliers or Matmatch, or use our Search under the following link to find more specific grades and formulations based on your application:

Polymer Advanced Search

Processing methods

Injection molding, extrusion, coating, thermoforming

Polyetherketoneketone (PEKK)

Description

Ashby charts

Applications

Suggested reading

Properties