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Typical Specifications of Parylene C

 

PARYLENE C VALUE

ASTM METHOD

GENERAL

Density (g/cm)

1.289

D1505

Refractive index

1.639

ELECTRICAL

Dielectric strength
(voltage breakdown)
volts/mil

5,600 volts

D149

Dielectric constant

 

D150

60 Hz

3.15

 

1 kHz

3.10

1 MHz

2.95

Dissipation factor

 

D150

60 Hz

0.020

 

1 kHz

0.019

 

1 MHz

0.013

Dielectric strength
@ 25µm, short time
MV/m

220

D149

Dielectric strength
@ 25µm, step-by-step
MV/m

185

D149

Volume resistivity
@ 23ºC, 50% RH, ohms

8.8 x 1016

D257

Surface resistivity
@ 23ºC, 50% RH, ohms

1 x 1014

D257

MECHANICAL

Tensile modulus, GPa

3.2

D882

Tensile strength, MPa

70

D882

Tensile strength, psi

10,000

D882

Yield strength, MPa

5.5

D882

Elongation to break, %

200

D882

Yield elongation, %

2.9

D882

Coefficient of  friction-static

0.29

D1894

Coefficient of  friction-dynamic

0.29

D1894

Rockwell hardness

R80

D785

THERMAL

Melting point, ºC

290ºC

Linear coefficient of
expansion (10-5/ºC)

3.5

D696

Thermal conductivity @ 25ºC
(watts/meter-Kelvin)

0.082

C177

Specific heat @ 20ºC
cal/g/ºC

0.17

 

BARRIER

Water absorption, % (24 hr)

0.06 (.029")

D570

Water vapor transmission
@ 37ºC (ng)

0.0004

D570

Gas permeability
cc-mil/100  in 2 - 24 hrs

 

N2

0.6

 

O2

5

 

CO2

14

H2

110

Moisture vapor transmission
gm-mil/100 in - 24 hrs

1

 

 

 
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