UV stabilizers are used frequently in plastics, including cosmetics and films. The primary function is to protect the substance from the long-term UV degradation effects from ultraviolet radiation.PTFE is a fluorocarbon solid, as it is a high-molecular-weight compound consisting wholly of carbon and fluorine. PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons demonstrate mitigated London dispersion forces due to the high electronegativity of fluorine. PTFE has one of the lowest coefficients of friction of any solid.
| Property Name | Units | Acetal Copolymer, PTFE Filled | Acrylic, UV Stabilized, Molded |
|---|---|---|---|
| Specific Heat Capacity | BTU/lb-°F | ||
| Shear Modulus | ksi | ||
| Compressive Yield Strength | psi | 5710 | |
| Poisson’s Ratio | |||
| Dielectric Constant | 3.7 | 3.2 | |
| Dielectric Strength | kV/in | 467 | 500 |
| Elongation at Break | % | 9.4 | 6 |
| Flexural Yield Strength | psi | 9820 | 14500 |
| Modulus of Elasticity | ksi | 348 | 479 |
| Hardness, Rockwell R | 110 | ||
| Tensile Strength, Ultimate | psi | 6580 | 9720 |
| Tensile Strength, Yield | psi | 8270 | 12300 |
| Electrical Resistivity | ohm-cm | 3.00e+15 | 1.00e+15 |
| Density | lb/in³ | 0.0531 | 0.043 |
| Max Service Temperature, Air | °F | 212 | 183 |
| Thermal Conductivity | BTU-in/hr-ft²-°F | 1.67 | |
| Fracture Toughness | ksi-in½ |
Post time: Dec-11-2017