Park Aerospace Nelcote® F-557 Phenolic Prepreg, Chopped Molding Compound Reinforced

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Park Aerospace Nelcote® F-557 Phenolic Prepreg, Chopped Molding Compound Reinforced
Categories:	Polymer; Thermoset; Phenolic
Material Notes:	Nelcote® F-557 is a high purity silica filler phonic resin coated on Commercial or Aerospace grade silica fabric. F-557 is used in the manufacture of intermediate temperature ablative rocket nozzles, heat shields, and combustion chambers in highly oxidative environments. 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

Filler Content	3.4 - 5.4 %
Volatiles	2.0 - 5.0 % @Temperature 135 °C	8 min

Mechanical Properties	Original Value	Comments
Tensile Strength, Yield	4300 psi @Temperature 23.9 °C	0° Direction, Dry; 325°F 2500psi; ASTM D3039b
	5400 psi @Temperature 23.9 °C	0° Direction, Dry; 325°F 2500psi and Post-Cure; ASTM D3039b
Tensile Modulus	2200 ksi @Temperature 23.9 °C	0° Direction, Dry; 325°F 2500psi and Post-Cure; ASTM D3039b
	2500 ksi @Temperature 23.9 °C	0° Direction, Dry; 325°F 2500psi; ASTM D3039b
Flexural Strength	8.50 ksi @Temperature 23.9 °C	Dry; 325°F 2500psi; ASTM D790
	15.0 ksi @Temperature 23.9 °C	Dry; 325°F 2500psi and Post-Cure; ASTM D790
Flexural Modulus	2100 ksi @Temperature 23.9 °C	Dry; 325°F 2500psi and Post-Cure; ASTM D790
Compressive Strength	25.5 ksi @Temperature 23.9 °C	Dry; 325°F 2500psi; ASTM D695
	31.0 ksi @Temperature 23.9 °C	Dry; 325°F 2500psi and Post-Cure; ASTM D695

Thermal Properties	Original Value	Comments
Specific Heat Capacity	0.240 BTU/lb-°F	ASTM C351
Thermal Conductivity	2.70 BTU-in/hr-ft²-°F @Temperature 149 °C	ASTM C177

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

Descriptive Properties
Nominal Prepreg Weight (oz/yd)	30
Resin Flow (%)	10-25	325°F, 150psi
Resin Solids Content (%)	30-36

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PPARK060 / 89332

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