Unfilled PPTA
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Poly(p-phenylene terephthalamide), (Kevlar, Twaron) PPTA
 

Thermo-Physical Properties

PROPERTYUNITVALUE / RANGE
Melting Point (Decomposition) °C427 - 482
Density g mL-1 1.44 - 1.45
Coefficient of Thermal Expansion x 10-5cm / (cm °C) -2.2 - (-4.9) (along axis)
Thermal ConductivityW / mK 2.5
   
 

Mechanical Properties at 23 °C

PROPERTY UNITVALUE / RANGE
Tensile Strength, Yield at 23 C MPa  
Tensile Strength, Break at 23 C MPa 2400 - 3600
Elongation, Yield %  
Elongation, Break % 1.9 - 4.4
Tensile Modulus at 23 C GPa 60 - 120
Flexural Strength, Yield MPa  
Flexural Modulus  MPa  
 

Electrical Properties

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

Other Properties

PROPERTY UNITVALUE / RANGE
Processing Temperature
°C
Shrinkage % < 0.1
Continuous Service Temperature °C  
Water Absorption, 24 hr. Immersion% 3.2 - 6.5
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