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Ensinger PEI

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Park Aerospace Nelcote® E-752 Epoxy Prepreg, IM7 Unitape Reinforced
Categories: Polymer; Thermoset; Epoxy

Material Notes: Nelcote® E-752 is a toughened, 185°C cure epoxy system designed for demanding structural applications up to 130°C. E-752 offers a good balance of toughness, high service temperature and good moisture resistance, as well as excellent tack and drape. Formulated for both oven and autoclave cure, E-752 provides for easy processing with oven cure, without sacrificing mechanical properties.

Key Features and Benefits:

  • Specifically designed to allow both oven cure and autoclave cure
    • Allows oven curing without sacrificing mechanical properties
  • Service temperatures up to 130°C
  • Controlled flow for ease of processing
  • Flexible cure temperature 132°C to 185°C
    • Good mechanical properties can be achieved through oven curing at 132°C, followed by post-cure at 185°C
  • Self-adhesive grade for sandwich panel applications

Applications/Qualifications:

  • Primary and Secondary Aircraft Structures
  • Ducting
  • Fairings
  • Nacelles

Information provided by Park Electrochemical Corp.

Key Words: EP
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Physical PropertiesOriginal ValueComments
Volatiles <= 1.9 %
@Temperature 135 °C
8 min
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Yield 340000 psi
@Temperature 23.9 °C
0° Direction, Dry, 365° Autoclave Cured; ASTM D3039
 350000 psi
@Temperature 121 °C
0° Direction, Dry, 365° Autoclave Cured; ASTM D3039
 356000 psi
@Temperature 121 °C
0° Direction, Wet, 365° Autoclave Cured; ASTM D3039
Tensile Modulus 23400 ksi
@Temperature 23.9 °C
0° Direction, Dry, 365° Autoclave Cured; ASTM D3039
 24200 ksi
@Temperature 121 °C
0° Direction, Dry, 365° Autoclave Cured; ASTM D3039
 24600 ksi
@Temperature 121 °C
0° Direction, Wet, 365° Autoclave Cured; ASTM D3039
Compressive Strength 148 ksi
@Temperature 121 °C
Wet, 365° Autoclave Cured; SACMA 1R-94
 190 ksi
@Temperature 121 °C
Dry, 365° Autoclave Cured; SACMA 1R-94
 264 ksi
@Temperature 23.9 °C
Dry, 365° Autoclave Cured; SACMA 1R-94
Compressive Modulus 21100 ksi
@Temperature 23.9 °C
Dry, 365° Autoclave Cured; SACMA 1R-94
 22800 ksi
@Temperature 121 °C
Wet, 365° Autoclave Cured; SACMA 1R-94
 27200 ksi
@Temperature 121 °C
Dry, 365° Autoclave Cured; SACMA 1R-94
Shear Modulus 690 ksi
@Temperature 23.9 °C
In-Plane, Dry, 365° Autoclave Cured; ASTM D3518
Shear Strength 13.2 ksi
@Temperature 23.9 °C
In-Plane, Dry, 365° Autoclave Cured; ASTM D3518
 
Thermal PropertiesOriginal ValueComments
Glass Transition Temp, Tg 170 °CWet; DMA
 190 °CDry; DMA
 
Processing PropertiesOriginal ValueComments
Gel Time 5.00 - 12.0 min
Shelf Life 12.0 Month
@Temperature -17.8 °C
 
Descriptive Properties
Fabric Area Weight (g/m²)120-300
Prepreg Resin Content (%)32-38
Resin Flow (%)6-20275°F, 50psi

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PPARK017 / 89289

Proto3000 – 3D Engineering Solutions

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