The Pulverisette 14 variable-speed rotor mill quickly grinds soft to medium-hard samples, even for sample preparation in accordance with RoHS analysis.
The fast rotor speed gently grinds temperature-sensitive samples.
Adding liquid nitrogen to difficult-to-grind samples such as styrene, polyester, synthetic resins, films, PVC, PP or PE makes them brittle, allowing them to be ground down so their fineness can be analysed.
The pin-insert allows oily and fatty materials to be crushed without using a sieve.
The Pulverisette 14 has a top speed of 20,000 rpm.
It is suitable for sample preparation.
A feed particle size of < 10mm allows a final fineness of up to 40um to be achieved.
The throughput depends on the material and is between 0.05 and 5kg an hour.
Rotors, sieve rings and collecting vessels made of different materials and sizes enable an optimal adjustment of the system to the application.
Gel permeability chromatography helps the Pulverisette 14 analyse polymers.
This process is a kind of liquid chromatography similar to the HPLC.
Because of the size of the molecules, the separation takes place in the solution.
Detectors can determine the polymer sample's average value of mol mass, polydispersity or viscosity.
Suitable sample preparation is important to dissolve the polymers.
But degradation - destruction of the characteristics of the material - must be avoided.
The Pulverisette 14 can achieve a final fineness of < 80um.
Adding liquid nitrogen to the polymer or adding dry ice while grinding, makes it more brittle, helping avoid degradation.
