Solvay CYCOM® 381 Epoxy Prepreg with CYCOM 7781 OST E-glass Fabric and 300FAW Epoxy

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Solvay CYCOM® 381 Epoxy Prepreg with CYCOM 7781 OST E-glass Fabric and 300FAW Epoxy
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	CYCOM® 381 epoxy prepreg is an epoxy prepreg that offers a 250°F (121°C) curing system with high 180°F (82°C)/wet mechanical properties yet has the excellent fatigue and durability necessary for primary structure applications. Features & Benefits: Excellent 180°F (82°C)/wet properties Service temperature to 220°F (104°C) Three- to four-fold increases in fatigue life compared to perhaps all conventional 250°F (121°C) curing epoxy prepregs. This increase is the result of a 10 – 15% higher strain endurance limit. Inherent toughness provides good durability and compression after impact performance Low moisture absorption Excellent for vacuum pressure/oven processing Applications: Primary and secondary structural aircraft parts requiring 180°F (82°C)/wet retention of properties and/or excellent fatigue behavior Components that require good durability and/or low processing temperatures Helicopter rotor blades Rotating or cycled components Co-cured aluminum assemblies/parts Doublers Propellers Composite repair Information provided by Cytec, subsequently acquired by Solvay.
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Mechanical Properties	Metric	English	Comments

Tensile Strength	218 MPa @Temperature 104 °C	31600 psi @Temperature 219 °F	Fill, wet; SACMA SRM-4
	252 MPa @Temperature 82.0 °C	36600 psi @Temperature 180 °F	Fill, wet; SACMA SRM-4
	272 MPa @Temperature 104 °C	39400 psi @Temperature 219 °F	Warp, wet; SACMA SRM-4
	310 MPa @Temperature 82.0 °C	44900 psi @Temperature 180 °F	Warp, wet; SACMA SRM-4
	481 MPa @Temperature 22.0 °C	69700 psi @Temperature 71.6 °F	Fill, ambient; SACMA SRM-4
	503 MPa @Temperature 22.0 °C	72900 psi @Temperature 71.6 °F	Warp, ambient; SACMA SRM-4
	572 MPa @Temperature -54.0 °C	82900 psi @Temperature -65.2 °F	Fill, dry; SACMA SRM-4
	638 MPa @Temperature -54.0 °C	92500 psi @Temperature -65.2 °F	Warp, dry; SACMA SRM-4
Elongation at Break	1.89 % @Temperature 104 °C	1.89 % @Temperature 219 °F	Warp; SACMA SRM-4
	1.98 % @Temperature 22.0 °C	1.98 % @Temperature 71.6 °F	Warp; SACMA SRM-4
Tensile Modulus	19.0 GPa @Temperature 104 °C	2760 ksi @Temperature 219 °F	Fill, dry; SACMA SRM-4
	23.0 GPa @Temperature 104 °C	3340 ksi @Temperature 219 °F	Warp, wet; SACMA SRM-4
	23.0 GPa @Temperature 82.0 °C	3340 ksi @Temperature 180 °F	Fill, wet; SACMA SRM-4
	25.0 GPa @Temperature 82.0 °C	3630 ksi @Temperature 180 °F	Warp, wet; SACMA SRM-4
	25.0 GPa @Temperature 22.0 °C	3630 ksi @Temperature 71.6 °F	Fill, ambient; SACMA SRM-4
	27.0 GPa @Temperature 22.0 °C	3920 ksi @Temperature 71.6 °F	Warp, ambient; SACMA SRM-4
	27.0 GPa @Temperature -54.0 °C	3920 ksi @Temperature -65.2 °F	Fill, dry; SACMA SRM-4
	28.0 GPa @Temperature -54.0 °C	4060 ksi @Temperature -65.2 °F	Warp, dry; SACMA SRM-4
Compressive Strength	245 MPa @Temperature 82.0 °C	35500 psi @Temperature 180 °F	Fill, dry; SACMA SRM-1
	283 MPa @Temperature 104 °C	41000 psi @Temperature 219 °F	Warp, wet; SACMA SRM-1
	305 MPa @Temperature 22.0 °C	44200 psi @Temperature 71.6 °F	Fill, wet; SACMA SRM-1
	360 MPa @Temperature 82.0 °C	52200 psi @Temperature 180 °F	Warp, wet; SACMA SRM-1
	523 MPa @Temperature -54.0 °C	75900 psi @Temperature -65.2 °F	Fill, ambient; SACMA SRM-1
	585 MPa @Temperature 104 °C	84800 psi @Temperature 219 °F	Fill, wet; SACMA SRM-1
	656 MPa @Temperature 22.0 °C	95100 psi @Temperature 71.6 °F	Warp, ambient; SACMA SRM-1
	785 MPa @Temperature -54.0 °C	114000 psi @Temperature -65.2 °F	Warp, dry; SACMA SRM-1
Shear Modulus	1.40 GPa	203 ksi	In-plane, SACMA SRM-7, wet
	2.50 GPa	363 ksi	In-plane, SACMA SRM-7, wet
	4.60 GPa	667 ksi	In-plane, SACMA SRM-7, ambient
	5.60 GPa	812 ksi	In-plane, SACMA SRM-7, dry
Shear Strength	32.4 MPa @Temperature 121 °C	4700 psi @Temperature 250 °F	Short Beam; SACMA SRM-8
	48.3 MPa @Temperature 104 °C	7000 psi @Temperature 219 °F	In-plane, wet; SACMA SRM-7
	53.8 MPa @Temperature 82.0 °C	7800 psi @Temperature 180 °F	In-plane, wet; SACMA SRM-7
	60.7 MPa @Temperature 22.0 °C	8800 psi @Temperature 71.6 °F	Short Beam; SACMA SRM-8
	105 MPa @Temperature 22.0 °C	15200 psi @Temperature 71.6 °F	In-plane, ambient; SACMA SRM-7
	134 MPa @Temperature -54.0 °C	19400 psi @Temperature -65.2 °F	In-plane, dry; SACMA SRM-7

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	104 °C	220 °F

Processing Properties	Metric	English	Comments
Gel Time	5.00 - 8.00 min @Temperature 121 °C	5.00 - 8.00 min @Temperature 250 °F

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PCYTED078_7 / 192660

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