coefficient of friction measured the using a Bowden-Leben machine with loads of between I and 4 kg (2.2 and 8.8 lb) and sliding velocities from 0.1 to 10 mm/s (0.02 to 2 ft/min) is reported that 0.04 and rises steeply at very light loads, say below 100 g. It is found that coefficient of friction is 0.016 at high loads (1360 kg)
coefficient of friction also depends upon sliding velocity, a high speed resulting in a high coefficient. By combining a low load and a high sliding velocity of 1.89 m/s (370 ft/min), the high value of 0.36 for the coefficient is recorded.
Of less general importance than the dependence on load, velocity and temperature, but still of interest is the observation shows that the coefficient is influenced by the orientation of the polymer, the coefficient being about 30% higher when sliding was across the chains than when it was along them.
| Liquid |
Angle of Contact |
| Water |
108°C |
| n-Hexadecane |
46°C |
| Toluene |
43°C |
| Benzene |
46°C |
| Methylene iodide |
88°C ,83°C |
| Carbon tetrachloride |
36°C |
| Mercury |
150°C |
| Glycerol |
100°C |
|
