Abstract

A small scale capillary viscometer that is capable of measuring the flow curves of 2–3 gms of molten polymer over the shear rate range 0.4 sec−1 to 20,000 sec−1 is described. A piezo electric crystal pressure transducer is used to measure the pressure directly above the capillary. Flow curves are given for anionic polystyrenes and polyethylene fractions, and it is shown that the viscosities measured agree with determinations in a cone and plate viscometer.

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