TREF0 pages

TREF
TEMPERATURE RISING ELUTION FRACTIONATION

Full automation of the classical technique for the
characterization of the Chemical Composition
Distribution in Polyolefins.
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.

KEY POINTS
Full automation of the TREF techniques to measure the CCD:
No manpower intervention required.
No solvents handling.
Low consumption of solvent.

The virtual instrumentation software controls the full process,
so no manpower intervention is required. Samples are put
into the vessels and the instrument performs the dissolution,
column loading, and temperature cycles combined with pump
flow control. At the end, vessels and lines are cleaned and the
TREF equipment is ready to analyze more samples.
The concentration of the sample is measured by an infrared
detector (Polymer Char’s IR4), which can also offer information
about comonomer content if a composition sensor is added.
More information can be obtained by adding Viscometer and/
or Light Scattering detectors.

Automated cleaning at the end of the analysis.
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.

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.
Find out more at www.polymerchar.com/TREF

TREF analysis of a bimodal LLDPE resin.

Polymer Characterization, S.A.

Gustave Eiffel, 8 Paterna
E-46980 Valencia, Spain

T.: +34 96 131 81 20
F.: +34 96 131 81 22

info@polymerchar.com
www.polymerchar.com