to Thermoplastics
to Properties of polymers
(submitted by the website administration)
| Thermoplastic | ||||
| Polymethylmethacrylate (PMMA) | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 1.19 *10³ | kg/m³ | 74.3 | lb/ft³ |
|---|---|---|---|---|
| Modulus of elasticity | 2.77 | GPa | 400 | ksi |
| Tensile strength | 61 | MPa | 9000 | psi |
| Elongation | 4 | % | 4 | % |
| Flexural strength | 103 | MPa | 15000 | psi |
| Thermal expansion (20 ºC) | 65*10-6 | ºCˉ¹ | 36*10-6 | in/(in* ºF) |
| Thermal conductivity | 0.21 | W/(m*K) | 1.46 | BTU*in/(hr*ft²*ºF) |
| Glass transition temperature | 100 | ºC | 212 | ºF |
| Maximum work temperature | 100 | ºC | 212 | ºF |
| Electric resistivity | 106-108 | Ohm*m | 108-1010 | Ohm*cm |
| Dielectric constant | 2.7 | - | 2.7 | - |
Applications: automobile lights, swimming pools, lenses.