Abstract
The determination of molecular weight distribution (MWD) of commercial high density polyethylene was studied by gel permeation chromatography (GPC), in which the apparatus and column packing materials (polystyrene gels) were designed and prepared by authors.
The calibration curve obtained by three methods, namely using narrow MWD polymer fractions, with broad MWD whole polymers and derived from universal calibration curve, were essentially consistent with each other.
The integrated MWD curves and values of average molecular weights obtained by GPC agreed well with those by traditional column fractionation, and it was deduced that molecular weight distributions of those commercial polyethylene samples show logarithmic normal distribution functions.
