eFunda Polymers: Properties of Epoxy {glass fiber reinforced, sheet molding compound (SMC)}

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Calculators

Epoxy	List of Suppliers

Additives:	glass fiber reinforced
Application:	sheet molding compound (SMC)

Material Properties

Mechanical Properties		Conditions
Mechanical Properties		State 1	State 2	ASTM
Elastic Modulus (MPa)	13800 - 27600	tensile		D638
Flexural Modulus (MPa)	13800 - 20700	23 ºC		D790
	10350 - 17250	93 ºC		D790
	8280 - 12420	149 ºC		D790
Tensile Strength (MPa)	138 - 242	at break		D638
Compressive Strength (MPa) at yield or break	138 - 207			D695
Flexural Strength (MPa) at yield or break	345 - 483			D790
Elongation at break (%)	1 - 2			D638
Hardness	55 - 65	Shore B		D638
Izod Impact (J/cm of notch) 1/8" thick specimen unless noted	15.9 - 21.2			D256A

Thermal Properties Conditions

Pressure State ASTM

Coef of Thermal Expansion (10^-6/ºC) 12 D696

Deflection Temperature (ºC) 288 1.82 MPa D648

Thermal Conductivity (W/m-ºC) 0.071 - 0.079 C177

Physical & Electrical Properties Conditions

State ASTM

Specific Gravity 1.4 D792

Water Absorption (% weight increase) 0.1 after 24 hrs D570

Processing Properties Conditions

Type ASTM

Melting Temperature (ºC) thermoset T_m, crystalline

Processing Temperature (ºC) 132 - 166 compression molding

132 - 166 transfer molding

Molding Pressure (MPa) 3 - 14

Compression Ratio 2

Linear Mold Shrinkage (cm/cm) 0.001 D955

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Suppliers

Quantum Composites, Inc.

Midland, MI

800-462-9318

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