Park Aerospace Nelcote® F-555 Phenolic Prepreg, ENKA Reinforced

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Park Aerospace Nelcote® F-555 Phenolic Prepreg, ENKA Reinforced
Categories:	Polymer; Thermoset; Phenolic
Material Notes:	Nelcote® F-555 is a carbon-filled MIL-R-9299 phenolic resin optimized for coating Carbonized Rayon cloth. F-555 is used extensively in the manufacture of high temperature rocket nozzles, heat shields, and combustion chambers. Key Features and Benefits: Provides a combination of high-strength and ablative properties for demanding applications Low thermal expansion Good Tack and Drape properties Applications/Qualifications: Rocket Nozzles Combustion Chambers Heat Shields Rocket Motor Throat Sections Information provided by Park Electrochemical Corp.
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Physical Properties	Original Value	Comments

Specific Gravity	1.47 g/cc	8HS form; ASTM D792
Filler Content	9.0 - 15 %
Volatiles	2.0 - 5.0 % @Temperature 163 °C	5 min
Thickness	15.0 mil	per ply, 8HS form

Mechanical Properties	Original Value	Comments
Hardness, Barcol	75	8HS form; ASTM D2583
Tensile Strength, Yield	21000 psi @Temperature 23.9 °C	0° Direction, Dry; 8HS form; ASTM D638
Tensile Modulus	2500 ksi @Temperature 23.9 °C	0° Direction, Dry; 8HS form; ASTM D638
Flexural Strength	39.0 ksi @Temperature 23.9 °C	Dry; 8HS form; ASTM D790
Flexural Modulus	2800 ksi @Temperature 23.9 °C	Dry; 8HS form; ASTM D790
Compressive Strength	55.0 ksi @Temperature 23.9 °C	Dry; 8HS form; ASTM D695
Compressive Modulus	2800 ksi @Temperature 23.9 °C	Dry; 8HS form; ASTM D695
Shear Strength	5.10 ksi @Temperature 23.9 °C	Short Beam; Dry; 8HS form; ASTM D5379

Thermal Properties	Original Value	Comments
CTE, linear	4.00 µin/in-°F @Temperature 204 °C	with ply; 8HS form; ASTM D696
	6.80 µin/in-°F @Temperature 204 °C	x-ply; 8HS form; ASTM D696
Specific Heat Capacity	0.500 BTU/lb-°F	8HS form; ASTM C351
Thermal Conductivity	0.500 BTU-in/hr-ft²-°F @Temperature 149 °C	x-ply; 8HS form; ASTM C177

Processing Properties	Original Value	Comments
Shelf Life	6.00 Month @Temperature 4.44 °C

Descriptive Properties
Fabric Area Weight (g/m²)	280
Prepreg Resin Content (%)	31-37
Resin Flow (%)	5-20	325°F, 150psi

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