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Ensinger PEI

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Hippe PS Polystyrene  (discontinued **)
Categories: Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Extrusion Grade

Material Notes: Amorphous thermoplastic with brilliant surface. High hardness and stiffness, but brittle and susceptible to impact. Very good dielectric properties. Physiologically safe if it falls below a particular value of monomer content.

Information provided by Hippe.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.05 g/ccDIN 53 479
Moisture Absorption at Equilibrium <= 0.10 %Absorption of humidity in standard operating environment; DIN 53 715
 
Mechanical PropertiesOriginal ValueComments
Ball Indentation Hardness 150 MPa
@Time 30.0 sec
DIN 53 456
Tensile Strength 45.0 MPaDIN 53 455
Elongation at Break 3.0 %DIN 53 455
Tensile Modulus 3.20 GPaDIN 53 457
Flexural Modulus 3.20 GPafrom bending test; DIN 53 457
Charpy Impact, Notched 20.0 kJ/m²DIN 53 453
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+16 ohm-cmDIN 53 482, VDE 0303, Part 3
Surface Resistance >= 1.00e+13 ohmDIN 53 482
Dielectric Constant 2.5
@Frequency 1e+6 Hz
DIN 53 483, IEC-250
Dielectric Strength 60.0 kV/mmBreakdown; DIN 53 481, IEC-243, VDE 0303 Part 1
Dielectric Loss Index 0.00040
@Frequency 1e+6 Hz
DIN 53 483, IEC-250
 
Thermal PropertiesOriginal ValueComments
CTE, linear 70.0 µm/m-°C
Specific Heat Capacity 1.30 J/g-°C
Thermal Conductivity 0.180 W/m-K
Maximum Service Temperature, Air 70.0 °CContinuous use
 80.0 °CShort Periods
Deflection Temperature at 1.8 MPa (264 psi) 70.0 °CISO-R 75 Method A
Flammability, UL94 HB
 
Descriptive Properties
Creep ResistanceGrade CTI 350DIN 53 480, IEC-112, VDE 0303 Part 1

**
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