HIPS
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High Impact Polystyrene (HIPS)

 

Thermo-Physical Properties

PROPERTY UNIT VALUE / RANGE 
Melt Temperature °C180 - 270
Density g mL-1 1.03 - 1.08
Coefficient of Thermal Expansion x 10-5cm / (cm °C) 8 - 10
Heat Deflection Temperature, 0.5 MPa °C 87 - 93
Heat Deflection Temperature, 1.8 MPa annealed (unannealed) °C 75 - 91
Thermal ConductivityW / mK 0.16 - 0.22
Rockwell  Hardness,  L Scale (M Scale)n/a  
    
 

Mechanical Properties at 23 °C

PROPERTY UNITVALUE / RANGE
Tensile Strength, Yield at 23 C MPa 20 - 28
Tensile Strength, Break at 23 C MPa  
Elongation, Yield % 1.2
Elongation, Break % 10 - 55
Tensile Modulus at 23 CMPa 1800 - 2280
Flexural Strength, Yield MPa 25 - 43
Flexural Modulus  MPa 1900 - 2300
Compressive Strength MPa 
Izod Notched J/m  (kJ/m2) 82 - 140
Izod Unnotched J/m 744
 

Electrical Properties

PROPERTY UNITVALUE / RANGE
Volume Resistivity
Ohm-cm  
 Dielectric Strength V/mm x 104 1.8
Dielectric Constant @ 1 MHz n/a  
Dissipation Factor @ 1 MHz n/a  
 

Other Properties

PROPERTY UNITVALUE / RANGE
Processing Temperature
°C 
Linear Mold Shrinkage cm/cm
Continuous Service Temperature °C  
Water Absorption, 24 hr. Immersion% 0.08 - 0.13
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