Materials and Tools
TPX® (Polymethylpentene)
TPX® (polymethylpentene) is used sparingly in the Upchurch Scientific product line. It offers good chemical compatibility across the full pH range. However, it is suspect to attack by halogenated chemicals and a number of organic solutions as well. Additionally, research has shown that, as the operating temperature reaches and exceeds 60 °C, the resistance to chemical attack is lowered considerably.
| Temperature Range | up to 50 °C |
|---|---|
| Thread Strength | Excellent |
| Oxygen Permeability | 206cc / 100in2 * 24h * atm / mil @ 25 °C |
| pH Range | 0 - 14 |
| Sterilization Techniques | |
| Autoclavable? | Y |
TPX Extended Properties
| General | Comments | Units | ||
|---|---|---|---|---|
| Density | ASTM D792 | g/cc | 1.28 | |
| Melt Flow | 1.05kg/190 °C | g/10 min | 9 | |
| Water Absorption | 24 hour | ASTM D570 | % | 0.25 |
| Mold Shrinkage | % | 0.5 | ||
| Water Absorption at Saturation | Immersion | ASTM D570/ ISO 62 | % | 1.25 |
| Hardness, Rockwell M | ASTM D785 | - | 112 | |
| Hardness, Rockwell R | ASTM D785 | - | 125 | |
| Mechanical | Comments | Units | ||
| Tensile Strength | Ultimate | ASTM D638 | MPa(psi) | 105(15,228) |
| Elongation | Break | ASTM D638 | % | 80 |
| Modulus of Elasticity | ASTM D638 | GPa(ksi) | 2.9(420) | |
| Flexural Modulus | ASTM D790 | GPa(ksi) | 3.3(479) | |
| Flexural Yield Strength | ASTM D790 | MPa(psi) | 150(21,700) | |
| Izod Impact Strength | Notched, at 23 °C | ASTM D256 | J/cm | 0.53 |
| Izod Impact Strength | Unnotched, at 23 °C | ASTM D256 | J/cm | 1.34 |
| Compressive Yield Strength | ASTM D695 | MPa(psi) | 151(22,000) | |
| Shear Strength | ASTM D732 | MPa(psi) | 103(15,000) | |
| Fatigue Strength | Flexural fatigue endurance limit, 50% RH, | ASTM D672 | MPa(psi) | 32(4,641) |
| Fatigue Strength | Flexural fatigue endurance limit, 50% RH, 1E+6 cycles | ASTM D672 | MPa(psi) | 32(4,641) |
| Poissons Ratio | - | 0.35 | ||
| Coefficient of Friction | Dynamic vs. carbon steel, 50mm/s (2in/s) | 0.42 | ||
| Thermal | Comments | Units | ||
| Coefficient of Thermal Expansion | linear 20 °C | µin/in- °F | 31 | |
| Deflection Temperature | at 1.8 MPa | ASTM D648 | °F(°C) | 392(200) |
| Melting Point | ASTM D3418 | °F(°C) | 639-798 (337-426) |
|
| Thermal Conductivity | - | BTU-in/hr-ft2- °F (W/m-K) | 0.90(0.22) | |
| Flammability Rating, UL94 | (5=V-0;4=V-1;3=V-2;1=HB) | UL94 | B | 1(HB) |
| Electrical | Comments | Units | ||
| Electrical Resistivity | ASTM D257 | ohm-cm | 1E+15 | |
| Dielectric Constant | at 1MHz | ASTM D150 | - | 3.7 |
| Dielectric Strength, kV/mm | 2.3mm (90 mils); Short Time | ASTM D149 | 500 kV/in | 19.7 |
| Dissipation Factor | at 1 MHz | ASTM D150 | - | 0.005 |
| Arc Resistance | ASTM D495 | sec | 220 |