Development of an Automated Cross-Fractionation Apparatus (TREF-GPC) for a Full Characterization of the Bivariate Distribution of Polyolefins

Polyolefin Characterization. Macromolecular Symposia.
Volume 257, 2007, Pages 13-28.
A. Ortín, B. Monrabal, J. Sancho-Tello.
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A compact automated instrument has been developed for measuring the bivariate distribution by TREF fractionation and subsequent GPC analysis of the fractions in a single run. The configuration of this instrument and its operation principles are covered here. High-resolution TREF fractionation of HDPE and fast methods with overlapped GPC injections are also discussed. Future developments, such as the addition of comonomer or molar mass sensitive detectors, as well as operation in GPC – TREF mode for broad MWD resins are outlined.

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