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PMMA vs. PLA

Both PMMA and PLA are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is PMMA and the bottom bar is PLA.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 3.2
3.5
Elongation at Break, % 4.0
6.0
Flexural Strength, MPa 110
80
Shear Modulus, GPa 1.7
2.4
Tensile Strength: Ultimate (UTS), MPa 71
50

Thermal Properties

Glass Transition Temperature, °C 110
60
Melting Onset (Solidus), °C 180
160
Specific Heat Capacity, J/kg-K 1260
1800
Thermal Conductivity, W/m-K 0.19
0.13

Otherwise Unclassified Properties

Density, g/cm3 1.2
1.3

Common Calculations

Stiffness to Weight: Axial, points 1.5
1.6
Stiffness to Weight: Bending, points 42
40
Strength to Weight: Axial, points 17
11
Strength to Weight: Bending, points 32
24
Thermal Diffusivity, mm2/s 0.13
0.058