Will liquid plastic filaments at 200°C catch fire when placed in ethanol at 60°C?
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Will liquid plastic filaments at 200°C catch fire after being extruded and placed in ethanol at 60°C? The main temperature at which it has just reached the ethanol level
Density: 0.78945 g/cm^3; (liquid) at 20°C Melting point: -114.3 °C (158.8 K) Boiling point: 78.4 °C (351.6 K) Solubility in water: p ethanol; Ethanol Ka = 15.9 Viscosity: 1.200 mPa·s (cP), at 20.0 °C Molecular dipole moment: 5.64 fC·fm (1.69 D) (gas) Refractive index: 1.3614 Relative density (water = 1): 0.79 Relative vapor density (air = 1): 1.59 Saturated vapor pressure (kPa): 5.33 (at 19°C) Heat of combustion (kJ/mol): 1365.5 Critical temperature (°C): 243.1 Critical pressure (MPa): 6.38 Logarithm of octanol/water partition coefficient: 0.32 Flash point (°C): 12 Ignition temperature (°C): 363 Upper explosion limit (% V/V): 19.0 Lower explosion limit (% V/V): 3.3
Density: 0.78945 g/cm^3; (liquid) at 20°C Melting point: -114.3 °C (158.8 K) Boiling point: 78.4 °C (351.6 K) Solubility in water: p ethanol; Ethanol Ka = 15.9 Viscosity: 1.200 mPa·s (cP), at 20.0 °C Molecular dipole moment: 5.64 fC·fm (1.69 D) (gas) Refractive index: 1.3614 Relative density (water = 1): 0.79 Relative vapor density (air = 1): 1.59 Saturated vapor pressure (kPa): 5.33 (at 19°C) Heat of combustion (kJ/mol): 1365.5 Critical temperature (°C): 243.1 Critical pressure (MPa): 6.38 Logarithm of octanol/water partition coefficient: 0.32 Flash point (°C): 12 Ignition temperature (°C): 363 Upper explosion limit (% V/V): 19.0 Lower explosion limit (% V/V): 3.3
If it is under nitrogen protection, it definitely will not catch fire. Even under air conditions, 200 degrees should not reach the auto-ignition temperature of ethanol, so ignition should not occur. The flash point is the temperature at which ignition can occur in the presence of an ignition source; it is not the temperature at which spontaneous combustion takes place. The temperature for spontaneous combustion is called the autoignition point. The flash point is also different from the ignition point; generally, at the flash point the fire starts and then goes out immediately, while at the ignition point the burning continues.
It won’t reach the point of a fire, but care should be taken regarding \"spillage from the pot\". Because the boiling point of ethanol is much lower than 200~
The ignition temperature is over 300, and the flash point is low, which means that a spark can cause ignition; at really high temperatures, vaporization will be significant. Nitrogen protection and use in a sealed container are necessary. It’s still a bit dangerous.