CRYSTEX® 42 is a large-capacity and fully-automated approach for obtaining the soluble fraction in polypropylene and copolymers. It stands as a modern alternative to the traditional wet chemistry method based on xylene solubility, which is known for being very time consuming and for requiring constant manual handling of solvent at high temperature.
This new system is very easy to operate and obtains the amorphous phase in a shorter time, it eliminates the manual handling of solvent, and it does not require performing any of the traditional tedious tasks by the analyst.
Results are very precise in part, due to automation, but also for integrating an infrared detector (IR4), which measures Ethylene Content as well. Moreover, for a truly complete analysis, the instrument measures intrinsic viscosity by means of a built-in dual capillary viscometer. All results (concentration, ethylene content and intrinsic viscosity) are obtained simultaneously for the whole sample, the soluble fraction, and the crystalline fraction.
CRYSTEX® 42 is based on the same TREF separation concept as its sibling instrument, CRYSTEX® QC, in which the sample is loaded into a TREF column twice. The first injection serves to measure the whole polymer and the second one remains within the column for a crystallization ramp that results in the separation of the soluble from the crystalline fraction.
CRYSTEX® QC and CRYSTEX® 42 also share the principle of complete automation and extremely simple operation, but differ in that CRYSTEX® QC has a single-position dissolution station, while CRYSTEX® 42 incorporates a high temperature autosampler with capacity of up to 42 vials. This makes CRYSTEX® 42 the ideal solution when large batches of samples need to be analyzed.
The dissolution process becomes part of the automated analysis workflow, so unattended analysis of a large batch of samples can be performed. By implementing CRYSTEX 42 significant savings on manpower, solvent and time are achieved while at the same time increasing the health and safety levels in the laboratory.