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 | CRYSTEX® 42 Instrument | CEF Instrument | CFC | CRYSTAF Instrument | TGIC Instrument |
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| Catalog Number | CRYSTEX 42 | CEF | CFC | CRYSTAF | TGIC |
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| Description | CRYSTEX® 42 is a high-throughput and fully-automated approach for obtaining the soluble fraction in polypropylene and copolymers. It stands as a modern and easy-to-operate alternative to the traditional wet chemistry method based on xylene solubility, which is known for being time consuming and for CRYSTEX® 42 is a high-throughput and fully-automated approach for obtaining the soluble fraction in polypropylene and copolymers. It stands as a modern and easy-to-operate alternative to the traditional wet chemistry method based on xylene solubility, which is known for being time consuming and for requiring constant manual handling of solvent at high temperature.
CRYSTEX® 42 incorporates a high temperature autosampler with 42 positions to analyze samples in 20mL vials (max. sample amount of 160mg). This system eliminates the need to handle solvent manually and it operates with less flammable solvents than Xylene (TCB or oDCB), increasing the safety level in the laboratory.
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.
Results are very precise thanks to its full automation and to its integrated infrared detector (IR4), which measures precisely the amount of sample analysed as well as providing ethylene content information. 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 for the whole sample, the soluble fraction, and the crystalline fraction.
While CRYSTEX® QC was designed to be installed in each production plant to monitor the process in real time analyzing a larger amount of sample (up to 4g), CRYSTEX® 42, with its high temperature autosampler, and has become perfect complement to be used in a central lab, where large batches of pelletized, more homogeneous samples need to be analyzed.
Features - Fully-automated analysis of the soluble fraction (amorphous fraction) in polypropylene and other polyolefins.
- Additional analysis of ethylene content and intrinsic viscosity for the soluble fraction, the crystalline fraction and whole sample.
- Fully automated process for 42 samples.
- Dissolution and full analysis of the first sample completed in 3 hours.
- Following samples results are obtained every 2 hours.
- No need for accurate weighing of sample or manual solvent handling.
- No external filtration or solvent evaporation required.
- Highly precise results.
- Compatible with other polyolefin materials such as LDPE and adaptable to other solubility tests (heptane or hexane solubles).
... Read More | Crystallization Elution Fractionation (CEF) is a new approach for measuring Chemical Composition Distribution (CCD) in polyolefins that combines the separation mechanisms of CRYSTAF and TREF. The instrument includes the capability of performing TREF and TGIC* techniques.
The instrument can analyze Crystallization Elution Fractionation (CEF) is a new approach for measuring Chemical Composition Distribution (CCD) in polyolefins that combines the separation mechanisms of CRYSTAF and TREF. The instrument includes the capability of performing TREF and TGIC* techniques.
The instrument can analyze up to 42 samples a day with disposable glass vials of 10 or 20 mL. The virtual instrumentation software controls the full process; therefore, no manpower is required. At the end of each sample analysis, the lines and the column are rinsed and the instrument can continue with the analysis of the next sample in the queue.
The concentration of the sample is measured by an Infrared detector, which also provides information about its comonomer content. More information on molar mass composition interdependence can also be obtained by adding a Viscometer detector. Optionally, the TREF column can be replaced by a TGIC* column in order to separate by adsorption and reach the composition range of elastomer resins.
Features - Fully automated CEF, TREF and TGIC* techniques (CCD measurement).
- No manpower required.
- No handling of solvents.
- Low solvent consumption.
- Automated rinsing at the end of the analysis.
- Subambient operation (down to -20°C) for low crystallinity samples.
- 42 samples can be analyzed sequentially and automatically with analysis time as short as 30 minutes per sample for high throughput analysis or as long as desired for high resolution analysis.
- Easily interchangeable Infrared Detectors; IR5 MCT for outstanding sensitivity in concentration and composition, and IR4 with carbonyls capability.
- Possibility of adding a Viscometer detector.
- Excellent reproducibility.
- Possibility of performing TGIC* by exchanging the column.
... 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 | 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 | Inquire | Crystallization Elution Fractionation | High Resolution Cross-Fractionation Chromatograph | Crystallization Analysis Fractionation | Thermal Gradient Interaction Chromatography |
| Applications | Inquire | Chemical Composition Distribution (CCD) in Polyolefins | Polyolefin characterization | Chemical Composition Distribution (CCD) in Polyolefins | Measuring Composition Distribution in Elastomers and Low Crystallinity Polyolefin Copolymers |
| Detector(s) | Infrared Detector IR4 and Viscometer | Infrared Detector IR4 and IR5 MCT, Viscometer | Infrared Detector IR4 and IR5 MCT | Infrared Detector IR4 | Infrared Detector IR4 and IR5 MCT, Viscometer |
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