Your application - our solution: Find out more about the perfect sample preparation in the field of plastics and textiles. Read our application reports with tips about comminution or take a look in our practical grinding report data base with numerous sample grindings with detailed information.
This process is a kind of liquid chromatography similar to the HPLC. Due to the size of the molecules the separation takes place in the solution. Depending on the detector, the average value of the mol mass, polydispersity and the viscosity of the polymer sample are determined. Here suitable sample preparation is important in order to dissolve the polymers. The degradation - the destruction of the characteristics of the material - has to be avoided though. An ideal solution of the sample preparation is the Variable-Speed-Rotor Mill PULVERISETTE 14. Here a final fineness of < 80µm ís achieved. An embrittlement of the polymere with liquid ntirogen or the grinding while adding dry ice avoid the degradation. The following graphics illustrate the analysis of PE (polyethylene) and PP (polypropylene).
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