Fractionation can be caused by a variety of chemical, biological, or physical processes and is employed in various areas of science, engineering and technology.
Fractionation systems are designed to separate an analyte from a sample into equal portions or fractions. It does so in accordance with either the analytes physical or chemical properties, such as by size, density, or bonding ability. In column chromatography, for example, fractionation occurs by difference of affinity whereas in cell fractionation, the cells components are fractioned out by difference in mass. Fractionation instruments provide hands-off, programable, and repeatable options for separating desired samples.
| | | | | |
Company | Polymer Char | Polymer Char | Polymer Char | Polymer Char | Polymer Char |
Item | CFC | CRYSTAF-TREF Instrument | CRYSTEX® QC Instrument | PREP_mc2 Instrument | SGIC 2D Instrument |
Citations | | | | | |
Catalog Number | CFC | CRYSTAF-TREF | CRYSTEX QC | PREP_mc2 | SGIC 2D |
Price | | | | | |
Description | This Cross-Fractionation Chromatograph obtains the bivariate distribution in polyolefins. The two-dimensional distribution that relates molar mass and chemical composition is often required for comprehensive characterization of complex materials. The CFC first fractionates the polymer according to This Cross-Fractionation Chromatograph obtains the bivariate distribution in polyolefins. The two-dimensional distribution that relates molar mass and chemical composition is often required for comprehensive characterization of complex materials. The CFC first fractionates the polymer according to composition through a Temperature Rising Elution Fractionation (TREF) process, while the resulting fractions are continuously injected into online GPC columns, where a second fractionation, this time according to molar mass, is performed.
Features - Analytical scale, fully-automated instrument for cross-fractionation of polyolefins.
- An integrated IR5 MCT detector provides excellent sensitivity in concentration and composition signals.
- A new autosampler with 42 vials for extended analysis throughput is incorporated.
- The first separation step on the basis of composition can be performed by TREF for crystallizable polyolefin materials or by TGIC for elastomer resins.
- Comprehensive information on molar mass and chemical composition distributions in a single analysis is obtained.
- Flexible definition of number of fractions and temperatures.
- Under standard conditions, two samples per day can be analyzed.
- Sub-ambient TREF operation (down to -20°C) for low crystallinity samples
... Read More | The CRYSTAF-TREF instrument is a very convenient option when needing to analyze the CCD in Polyolefins, since either CRYSTAF or TREF techniques can be performed just by changing the configuration of the equipment.
Features - Possibility of running CRYSTAF or TREF techniques in the same instrument.
The CRYSTAF-TREF instrument is a very convenient option when needing to analyze the CCD in Polyolefins, since either CRYSTAF or TREF techniques can be performed just by changing the configuration of the equipment.
Features - Possibility of running CRYSTAF or TREF techniques in the same instrument.
- Full automation of the CRYSTAF and TREF techniques to measure the CCD
- 5 samples can be analyzed with no supervision required; done sequentially in TREF mode with an analysis time of 6 hours/sample, and simultaneously in CRYSTAF mode with a total analysis time of 8 hours.
- Possibility of subambient operation (down to -20ºC) for low crystallinity samples
... Read More | CRYSTEX® QC measures the Soluble Fraction % (amorphous fraction) in polypropylene and other polyolefin resins.
This instrument is an automated alternative to the traditional wet chemistry method based on xylene solubility, known for being time consuming and requiring constant manual CRYSTEX® QC measures the Soluble Fraction % (amorphous fraction) in polypropylene and other polyolefin resins.
This instrument is an automated alternative to the traditional wet chemistry method based on xylene solubility, known for being time consuming and requiring constant manual handling of solvent at high temperature. CRYSTEX® QC is easy to operate and obtains the amorphous phase content in a short time. It eliminates the need to handle solvent manually and uses less flammable solvents than Xylene (TCB or oDCB), increasing the safety level in the laboratory.
The instrument automates the entire analysis process, including dissolution, separation of the soluble fraction from the crystalline matrix, and analysis by the online detectors.
Precise quantification is achieved by means of an infrared detector that also delivers ethylene content information. Moreover, the instrument measures intrinsic viscosity by means of a built-in dual capillary viscometer. All results (concentration, ethylene content and intrinsic viscosity) are obtained for the whole sample, the amorphous fraction, and the crystalline fraction.
Up to 4g of polymer can be analyzed, one sample at a time with CRYSTEX QC. For an equally automated analysis of multiple samples (up to 42), known to be homogenous (pelletized), can be performed using the same technology in the CRYSTEX® 42.
Features - Fully-automated analysis of the soluble (amorphous) fraction in polypropylene and other polyolefins.
- A sample can be analyzed every 2.5 hours (including dissolution and rinsing time) without manual operation.
- No need for accurate weighing of sample nor manual solvent handling.
- No external filtration nor solvent evaporation required.
- Additional measurement of ethylene content and intrinsic viscosity for the fraction, the crystalline fraction, and whole sample.
- For Process /QC laboratories in production plants.
- Compatible with other polyolefin materials such as LDPE, and adaptable to other solubility tests (heptane or hexane solubles).
... Read More | PREP mc2 is a preparative instrument that obtains the physical fractions of a polymer according to its molar mass or chemical composition (TREF or CRYSTAF). The sample is put into the vessels and the fractionation is performed automatically according to the selected method conditions in less than 24PREP mc2 is a preparative instrument that obtains the physical fractions of a polymer according to its molar mass or chemical composition (TREF or CRYSTAF). The sample is put into the vessels and the fractionation is performed automatically according to the selected method conditions in less than 24 hours.
The resulting fractions can be analyzed afterwards by techniques such as GPC, TREF, CRYSTAF, NMR, FTIR or DSC. Up to 16 fractions can be obtained from a single sample fractionation, and two different samples can be fractionated at the same time, in which case up to 8 fractions per sample can be collected per run.
Features - Fully-automated fractionation process.
- Possibility of subambient operation (down to -20°C) for low crystallinity samples.
- Flexible hardware and software to carry out different fractionation methods.
... Read More | The Two-Dimensional Solvent Gradient Interaction Chromatograph (SGIC 2D) instrument is the only high temperature SGIC equipment commercially available. The system performs an analytical fractionation of the polymer according to chemical composition by selective adsorption/desorption on a HPLC columnThe Two-Dimensional Solvent Gradient Interaction Chromatograph (SGIC 2D) instrument is the only high temperature SGIC equipment commercially available. The system performs an analytical fractionation of the polymer according to chemical composition by selective adsorption/desorption on a HPLC column, followed by a second separation according to molar mass on a GPC/SEC column.
The instrument is fully automated and the whole process is controlled by the virtual instrumentation software. The detection is done by a standard infrared detector at the exit of the GPC/SEC columns, which provides a linear response and an outstanding stability, overcoming the limitations in detection found in single dimension SGIC due to the varying mobile phase composition (using TCB as second solvent).
At the end of the analysis, the two-dimensional distribution interrelating molar mass and chemical composition is obtained. This combined information is often required for comprehensive characterization of complex materials. The SGIC 2D is especially suitable for the analysis of samples of low crystallinity or complex polarity distribution, when the classic cross-fractionation technique based on crystallization (TREF-GPC) does not provide the desired separation.
The composition molar mass interdependence is measured in hours instead of days, with limited solvent consumption and no manual intervention, in an intrinsically safe set-up.
Features - Fully automated instrument to measure the chemical composition – molar mass interdependence of complex and functional Polyolefins.
- Of special interest for polar or low crystallinity Polyolefins.
- Detection performed in TCB and in isocratic mode: a linear IR detector can be used instead of a non-linear ELSD. Compatible with molar-mass
- -sensitive detectors.
- No solvents handling, fully automated process, including in-line filtration.
- Flexible definition of the number of fractions and the solvent gradient profile.
- Bivariate distribution results presented as contour or 3D surface graphs.
- Automated analysis of a sequence of samples, with flexibility to use different methods for each one.
... Read More |
Type | High Resolution Cross-Fractionation Chromatograph | Inquire | Soluble Fraction Determination, Amporphous Content Measure, Quality Control, Production Control | Preparative Fractionation | Two-Dimensional Solvent Gradient Interaction Chromatograph |
Applications | Polyolefin characterization | Chemical Composition Distribution (CCD) in Polyolefins | Inquire | Inquire | Analysis of samples of low crystallinity or complex polarity distribution |
Detector(s) | Infrared Detector IR4 and IR5 MCT | Infrared Detector IR4 and Viscometer | Infrared Detector IR4 | Inquire | Infrared Detector IR4 and IR5 MCT |
Get Quote | | | | | |