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 | TGIC Instrument | CFC | CRYSTAF Instrument | PREP C20 Instrument | SGIC 2D Instrument |
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| Catalog Number | TGIC | CFC | CRYSTAF | PREP C20 | SGIC 2D |
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| Description | 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 | 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 | CRYSTAF instrument performs Crystallization Analysis Fractionation technique to separate the polymer by its comonomer content. The process is done in a single temperature ramp, while the polymer solution concentration is monitored by using the infrared detector IR4 of Polymer Char.
CRYSTAF can be CRYSTAF instrument performs Crystallization Analysis Fractionation technique to separate the polymer by its comonomer content. The process is done in a single temperature ramp, while the polymer solution concentration is monitored by using the infrared detector IR4 of Polymer Char.
CRYSTAF 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 CRYSTAF technique to measure the CCD
- Analysis of 5 samples in 8 hours.
- Convertible into a CRYSTAF-TREF apparatus.
- Possibility of subambient operation (down to -20ºC) for low crystallinity samples.
... Read More | PREP C20 is a fully-automated preparative pilot-plant-type equipment designed to fractionate, in a column's support, large amounts of polymer according to its chemical composition by a Temperature Rising Elution Fractionation (TREF) process, or according to its Molar Mass, by modifying the solvent PREP C20 is a fully-automated preparative pilot-plant-type equipment designed to fractionate, in a column's support, large amounts of polymer according to its chemical composition by a Temperature Rising Elution Fractionation (TREF) process, or according to its Molar Mass, by modifying the solvent power through a solvent-non solvent combination, typically in isothermal conditions.
A dry sample is put in a vessel and filled with solvent for dissolution. The sample solution is then loaded into a column where the fractionation takes place. The equipment fractionates the sample following the selected method's conditions and number of fractions, which can be eluted at the volumes desired.
The main steps in the preparative fractionation process (dissolution, column loading, crystallization, elution, and fraction collection) are performed in an automatic mode, thus, avoiding the need for handling hot and large amounts of solvent.
PREP C20 facilitates cross-fractionation studies (fractionation through TREF or Molar Mass and follow up analysis through GPC/SEC or TREF), that have been demonstrated to be a necessary tool to fully characterize resins. The fractions obtained can be further analyzed by spectroscopic techniques and can be used for micromechanical testing as well.
- Fully-automated preparative fractionation
- Up to 20 grams of polymer, depending on the sample.
- Column-based fractionation.
- Unlimited number of fractions (up to 9 fractions without exchanging bottles).
- No handling of hot solvents.
- Fractionation modes by TREF technique or by Molar mass through solvent- non-solvent approach.
- Subambient operation thanks to an integrated compressor (no need for liquid coolants).
- By exchanging the column, the fractionation can be performed by Thermal or Solvent Gradient Interaction Chtomatography.
... 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 | Thermal Gradient Interaction Chromatography | High Resolution Cross-Fractionation Chromatograph | Crystallization Analysis Fractionation | Preparative Fractionation | Two-Dimensional Solvent Gradient Interaction Chromatograph |
| Applications | Measuring Composition Distribution in Elastomers and Low Crystallinity Polyolefin Copolymers | Polyolefin characterization | Chemical Composition Distribution (CCD) in Polyolefins | Inquire | Analysis of samples of low crystallinity or complex polarity distribution |
| Detector(s) | Infrared Detector IR4 and IR5 MCT, Viscometer | Infrared Detector IR4 and IR5 MCT | Infrared Detector IR4 | Inquire | Infrared Detector IR4 and IR5 MCT |
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