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IR Transmitting PMMA Disc

IR Transmitting PMMA Discs from Goodfellow are plastic discs made of polymethylmethacrylate (PMMA) that allow infrared light to pass through them. With 13 size variations available, they can be used in a range of infrared spectroscopy, sensing and imaging applications across scientific research and industry. The PMMA material enables high IR transmittance while providing a durable and lightweight plastic disc substrate for holding samples or mounting optics. The variety of disc sizes and thicknesses offered by Goodfellow provides flexibility to select the right IR transmitting disc for you application needs.
Thickness: 1mm
Diameter: 8mm
Technical Name: Polymethylmethacrylate
Grade: IR Transmitting
Formula: PMMA, Acrylic
Density: 1.185g/cm³
CAS Number: 9011-14-7
Production Method: Cast
Colour: Dark Red / Black
UOM Code: 156-823-05
SKU: 1000054069
Product Code: ME30-SH-000119

Tolerances

Disc
Thickness ±20%
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€106.64
each
  • Buy 5 for €86.38 each and save 19%
  • Buy 10 for €78.91 each and save 26%

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Tolerances

Disc
Thickness ±20%
Technical Data Sheet
Safety Data Sheet

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Material Properties for Polymers

Physical Properties
Element Value
Abbe number 57.2
Flammability HB
Radiation resistance Fair
Refractive index 1.49
Resistance to Ultra-violet Good
Limiting oxygen index( % ) 17-20
Water absorption - over 24 hours( % ) 0.2
Density( gcm⁻³ ) 1.19
Chemical Resistance
Element Value
Acids - concentrated Good-Poor
Acids - dilute Good-Poor
Alcohols Good-Poor
Alkalis Good
Aromatic hydrocarbons Poor
Greases and Oils Good
Halogenated Hydrocarbons Poor
Halogens Poor
Ketones Poor
Electrical Properties
Element Value
Dielectric constant @1MHz 2.6
Dissipation factor @ 1MHz 0.014
Dielectric strength( kV mm⁻¹ ) 15
Surface resistivity( Ohm/sq ) 10¹⁴
Volume resistivity( Ohmcm ) 2-14 x 10¹⁵
Mechanical Properties
Element Value
Hardness - Rockwell M92-100
Poisson's ratio 0.35-0.4
Elongation at break( % ) 2.5-4
Tensile modulus( GPa ) 2.4-3.3
Izod impact strength( J m⁻¹ ) 16-32
Tensile strength( MPa ) 80
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 105
Heat-deflection temperature - 1.8MPa( C ) 95
Lower working temperature( C ) -40
Upper working temperature( C ) 50-90
Specific heat( J K⁻¹ kg⁻¹ ) 1400-1500
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.17-0.19@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 70-77
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