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TPX Polymethylpentene Specifications 

 

GENERAL DESCRIPTION
TPX Polymethylpentene is the lightest of all known polymers with a density of 0.83 g/cm. It's most important property is optical transparency in both the far-infrared and visible parts of the spectrum. TPX also has excellent electrical insulating and chemical resistance properties, and offers a very high melting point. It is available in sheet, rod, tube and film forms.

 

OPTICAL AND ACOUSTIC PROPERTIES
TPX is optically transparent in far-infrared and visible parts of the spectrum, allowing the co-transmission of a HeNe laser alignment beam. Index of refraction is 1.46 and is relatively independent of wavelength. Loss is very low at mm-wavelengths and gradually increases until becoming unacceptable in the mid-IR at about 30 to 50 microns wavelength.
Because of its low density, TPX has high acoustic efficiency (a high damping factor due to large internal losses.) It also displays exceptionally low distortion and high power handling characteristics.

 

APPLICATIONS

 


TYPICAL PROPERTIES of TPX PolyMethylPentene

ASTM or UL test Property TPX
PHYSICAL
D792 Density (lb/in)
(g/cm)
0.030
0.83
D570 Water Absorption, 24 hrs (%) 0.01
MECHANICAL
D638 Tensile Strength (psi) 4,100
D638 Tensile Modulus (psi) 280,000
D638 Tensile Elongation at Break (%) 10
D790 Flexural Strength (psi) 6,100
D790 Flexural Modulus (psi) 210,000
D695 Compressive Strength (psi) -
D695 Compressive Modulus (psi) -
D785 Hardness, Shore D D85
D256 IZOD Notched Impact (ft-lb/in) 1
THERMAL
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in.- F)
6.5
D648 Heat Deflection Temp (F / C)
at 264 psi

212 / 100
D3418 Melting Temp (F / C) 464 / 240
- Max Operating Temp (F / C) - / -
C177 Thermal Conductivity
(BTU-in/ft-hr-F)
(x 10-4 cal/cm-sec-C)

1.16
4.0
UL94 Flammability Rating HB
ELECTRICAL
D149 Dielectric Strength (V/mil) short time, 1/8" thick 20
D150 Dielectric Constant at 1 KHz 2.12
D150 Dissipation Factor at 1 MHz 0.000025
D257 Volume Resistivity (ohm-cm)at 50% RH > 1016

NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.
All values at 73F (23C) unless otherwise noted.

TPX is a registered trademark of Mitsui Petrochemical Industries, Ltd.

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Designed By Weblord Inc, (514) 696-2742 1996
Last modified: Thursday, July 11, 2013 03:27 PM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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