eFunda Polymers: Properties of Polyimide {thermoset, unfilled}

Generic (ABS, ...) Trade Name


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Calculators

Polyimide	List of Suppliers

State:	thermoset
Additives:	unfilled

Material Properties

Mechanical Properties		Conditions
Mechanical Properties		State 1	State 2	ASTM
Elastic Modulus (MPa)	3174 - 32085	tensile		D638
Elastic Modulus (MPa)	2905	compressive		D638
Flexural Modulus (MPa)	2912 - 20700	23 ºC		D790
Flexural Modulus (MPa)	7107 - 18561	149 ºC		D790
Tensile Strength (MPa)	30 - 159	at break		D638
Tensile Strength (MPa)	30 - 159	at yield		D638
Compressive Strength (MPa) at yield or break	134 - 228			D695
Flexural Strength (MPa) at yield or break	45 - 345			D790
Elongation at break (%)	1			D638
Hardness	110 - 120	Rockwell M		D638
Izod Impact (J/cm of notch) 1/8" thick specimen unless noted	0.3 - 8.0			D256A

Thermal Properties Conditions

Pressure State ASTM

Coef of Thermal Expansion (10^-6/ºC) 15 - 50 D696

Deflection Temperature (ºC) 300 - 302 1.82 MPa D648

Thermal Conductivity (W/m-ºC) 0.230 - 0.502 C177

Physical & Electrical Properties Conditions

State ASTM

Specific Gravity 1.41 - 1.9 D792

Water Absorption (% weight increase) 0.45 - 1.25 after 24 hrs D570

Dielectric Strength (V/mil);
1/8" thick specimen unless noted 480 - 508 D149

Processing Properties Conditions

Type ASTM

Melting Temperature (ºC) thermoset T_m, crystalline

Processing Temperature (ºC) 238 - 252 general

Molding Pressure (MPa) 49 - 200

Compression Ratio 1 - 1.2

Linear Mold Shrinkage (cm/cm) 0.001 - 0.01 D955