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.
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| Company | Polymer Char | Polymer Char | Polymer Char | Polymer Char | Polymer Char |
| Item | TREF Instrument | CFC | CRYSTEX® QC Instrument | PREP_mc2 Instrument | TGIC Instrument |
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| Catalog Number | TREF | CFC | CRYSTEX QC | PREP_mc2 | TGIC |
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| Description | Temperature Rising Elution Fractionation has been the most comprehensive technique for the characterization of the Chemical Composition Distribution (CCD) in polyolefins, and Polymer Char’s TREF is the first fully automated apparatus implementing this technique.
TREF can be converted into a CRYSTAFTemperature Rising Elution Fractionation has been the most comprehensive technique for the characterization of the Chemical Composition Distribution (CCD) in polyolefins, and Polymer Char’s TREF is the first fully automated apparatus implementing this technique.
TREF can be converted into a CRYSTAF-TREF combined system capable of running both techniques by using the same hardware. Each technique can provide complementary information on the CCD in some complex resins.
Features - Full automation of the TREF techniques to measure the CCD
- 5 samples can be analyzed sequentially with no supervision required, with an analysis time of 6 hours per sample.
- Possibility of adding other detectors like Viscometer or Light Scattering.
- Easy convertible into a CRYSTAF-TREF apparatus.
- Possibility of subambient operation (down to -20ºC) for low crystallinity samples.
... Read More | 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 | 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 TGIC Instrument is a fully automated Thermal Gradient Interaction Chromatograph Instrument for measuring Composition Distribution in Elastomers and Low Crystallinity Polyolefin Copolymers.
Features - Fully automated operation with no manual solvent handling. Integrated vial filling with solvent,
The TGIC Instrument is a fully automated Thermal Gradient Interaction Chromatograph Instrument for measuring Composition Distribution in Elastomers and Low Crystallinity Polyolefin Copolymers.
Features - Fully automated operation with no manual solvent handling. Integrated vial filling with solvent, sample dissolution and in-line filtration.
- Fast analysis time of around 2-3 hours including sample dissolution.
- Analysis of up to 42 samples sequentially, with the possibility of using different methods each one.
- Both TGIC and CEF analyses can be performed in the same instrument with dedicated software packages.
- Easy incorporation of Polymer Char’s on-line Viscometer for composition molar mass interdependence.
- Option to integrate IR5 MCT detector for maximum sensitivity in both concentration and composition signals.
... Read More |
| Type | Temperature Rising Elution Fractionation | High Resolution Cross-Fractionation Chromatograph | Soluble Fraction Determination, Amporphous Content Measure, Quality Control, Production Control | Preparative Fractionation | Thermal Gradient Interaction Chromatography |
| Applications | Chemical Composition Distribution (CCD) in Polyolefins | Polyolefin characterization | Inquire | Inquire | Measuring Composition Distribution in Elastomers and Low Crystallinity Polyolefin Copolymers |
| Detector(s) | Infrared Detector IR4 and Viscometer | Infrared Detector IR4 and IR5 MCT | Infrared Detector IR4 | Inquire | Infrared Detector IR4 and IR5 MCT, Viscometer |
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