Polymethyl methacrylate (PMMA)

Alternative and trade names
Altuglas®, Acrylite®, Cyrolite®, Plexiglas®


Its outstanding resistance proprieties to mechanical damage and discoloration by UV rays provide an unsurpassed surface hardness (Rockwell M-Scale) and allow an higher heat resistance than impact grades.



Density ρ

1.17 - 1.19 g/cm³ at 20 °C


Elastic modulus E

3.1 - 3.3 GPa at 20 °C

Elongation A

2 - 10 % at 20 °C

Impact strength, Charpy notched Ivnot

1.2 - 2 kJ/m² at 20 °C

Impact strength, Charpy unnotched Iunnot

11 - 22 kJ/m² at 20 °C

Max allowed stress σmax

30 - 80 MPa at 20 °C

at 2-10% strain


Coefficient of thermal expansion α

6E-5 - 1.2E-4 1/K at 20 °C


UL 94 HB

Max service temperature, long Tmaxlong

65 - 90 °C

Max service temperature, short Tmaxshort

85 - 100 °C

Specific heat capacity cp

1470 J/(kg·K) at 20 °C

Thermal conductivity λ

0.18 - 0.19 W/(m·K) at 20 °C


Dielectric constant εr

2.7 - 3.7 [-] at 20 °C

Electrical resistivity ρel

1.00E+13 Ω·m at 20 °C




Technological properties

Application areas

Light guides, glasses, lenses, solar technology, optical data storage

Processing methods

Injection molding, extrusion, thermoforming

This material data has been provided by M-Base.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.