Correlation Between GPC, DSC and Analytical TREF for Linear Polyethylene (original) (raw)

International Journal of Polymer Analysis and Characterization, 2015

Abstract

ABSTRACT The analytical temperature rising elution fractionation (TREF) of linear polyethylene (PE) samples with different densities was done in 1-chloronaphthalene using a gel permeation chromatograph (GPC) coupled with a gas chromatograph (GC). The corrected peak elution temperatures completed the previous data in trichlorobenzene, xylene and dibutoxymethane. A mathematical correlation was found for diluted linear PE samples, between the α parameter of the Mark-Houwink-Sakurada (MHS) equation governing the retention time in GPC, the bulk melting temperature measured by differential scanning calorimetry (DSC) and the TREF peak elution temperature. The extrapolation to the melting temperature measured by DSC gives α = 0.5, thus confirming the hypothesis that polymer conformations in the melt are similar with those in a theta solvent.

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