Dampfdruckosmometrische Molekulargewichtsbestimmungen von hochschmelzenden,oxidierten Polyethylenwachsen

Molecular Weight Determination of High-melting, Oxidized Polyethylene Waxes by Vapour Pressure Osmometry Amongst the high-malting oxidized polyethylene waxes PE-Wax AC 392 of Allied Chemical Corp, holds an exceptional position as for its specification. Because of its crystallinity and the high melting point AC 392 can only be kept in solution at high temperatures. Several attempts to determine the molecular weight failed so far, because of these difficulties. The average number of the molecular weight (M?n) was determined for AC 392 and some similar waxes with a commercial vapour pressure osmometer at a working temperature of 125°C. The selection of the solvent is of importance; the high measuring temperature requires special experimental conditions.