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Fractionation of HDPE on quench cooling
Authors:Claudia A. Fonseca  I. R. Harrison
Affiliation:(1) Department of Materials Science and Engineering, The Pennsylvania State University, 325 Steidle Building, 16802 University Park, PA, USA
Abstract:In a previous paper we discussed co-crystallization in a LDPE/HDPE blend using TREF and DSC. As part of that study it was observed that pure HDPE showed an unexpected fractionation behavior when quench crystallized in TREF. The overall peak broadened and two peaks appeared instead of the previously observed single peak for slow cooled HDPE.The development of two peaks was observed for all commercial HDPEs investigated, independent of their melting indices and densities. TREF and GPC were used in an attempt to evaluate the origin of the two HDPE components.The authors appreciate support from CAPES-BRAZIL (C.A.F.). Additional thanks go to Dr. G. W. Knight in Dow Chemical Company for kindly providing the polymer samples and performing the GPC analysis.
Keywords:HDPE  quench cooling  TREF
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