Styrene Methyl Methacrylate (SMMA)

Alternative and trade names


Transparent styrene acrylic copolymers are a premium choice for applications demanding a strong, stiff, water-clear plastic. It provides excellent thermal stability, better alcohol resistance, and less molded in stress than acrylic as well as good flowability.

Ashby charts

See where falls on the material property chart for Density against Elastic modulus in your materials selection and design process.



Density ρ

1.03 - 1.13 g/cm³ at 20 °C


Elastic modulus E

3.1 - 3.4 GPa at 20 °C

Elongation A

2 - 3 % at 20 °C

Impact strength, Charpy notched Ivnot

1.5 - 2.5 kJ/m² at 20 °C

Impact strength, Charpy unnotched Iunnot

12 - 15 kJ/m² at 20 °C

Tensile strength Rm

60 - 70 MPa at 20 °C

at 2-3% strain



UL 94 HB




Technological properties

Application areas

Medical devices, office accessories, water filters, food boxes, diabetes devices

Processing methods

injection molding, extrusion

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.