Park Aerospace Nelcote® V-341 Polybutadiene Prepreg, 581 Quartz Reinforced

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Park Aerospace Nelcote® V-341 Polybutadiene Prepreg, 581 Quartz Reinforced
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Nelcote® V-341 is Polybutadiene resin system designed to provide excellent electrical properties in demanding airborne, shipboard, and undersea applications. Key Features and Benefits: Extremely low Dk/Df values for demanding RF / microwave applications Self adhesive bond to foam cores Long ambient out-time for easy processing Easily processed in both vacuum/oven and autoclave processes A cost effective, shop-friendly alternative to BMI and Cyanate Ester materials in many applications Resistant to fungus, moisture, rain impact, and most chemicals Applications/Qualifications: High performance radomes Signature control devices US Army Helicopter Air Force Ground-Based Radar Information provided by Park Electrochemical Corp.
Key Words:	PB
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Physical Properties	Original Value	Comments

Volatiles	<= 2.0 % @Temperature 288 °C	10 min
Water Absorption	0.050 %	14 days immersion

Mechanical Properties	Original Value	Comments
Hardness, Barcol	70
Tensile Strength, Yield	85000 psi @Temperature 23.9 °C	0° Direction, Dry; ASTM D638
Tensile Modulus	3700 ksi @Temperature 23.9 °C	0° Direction, Dry; ASTM D638
Flexural Strength	34.0 ksi @Temperature 93.3 °C	Dry; ASTM D790
	65.0 ksi @Temperature 23.9 °C	Dry; ASTM D790
Flexural Modulus	2900 ksi @Temperature 93.3 °C	Dry; ASTM D790
	3100 ksi @Temperature 23.9 °C	Dry; ASTM D790
Compressive Strength	22.0 ksi @Temperature 93.3 °C	Dry; Post-Cure; ASTM D695
	37.0 ksi @Temperature 23.9 °C	Dry; Post-Cure; ASTM D695
	40.0 ksi @Temperature 23.9 °C	Dry; ASTM D695
Compressive Modulus	3400 ksi @Temperature 23.9 °C	Dry; Post-Cure
	3700 ksi @Temperature 23.9 °C	Dry

Electrical Properties	Original Value	Comments
Dielectric Constant	3.09 @Frequency 1e+10 Hz
	3.12 @Frequency 3.50e+10 Hz
Dissipation Factor	0.0030 @Frequency 3.50e+10 Hz
	0.0035 @Frequency 1e+10 Hz

Processing Properties	Original Value	Comments
Gel Time	1.00 - 1.50 min @Temperature 171 °C
Shelf Life	3.00 Month @Temperature 4.44 °C
	6.00 Month @Temperature -17.8 °C

Descriptive Properties
Fungus Resistance	Rated 1 (Pass)	ASTM G21-70
Prepreg Resin Content (%)	26-33
Rain Impact Erosion	No detrimental effect at 15 minutes	2mm droplet at 1"/hr
Resin Flow (%)	6-14	350°F, 100psi

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PPARK071 / 89343

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