Abstract
AbstractMelt and solution viscosity properties of laboratory‐prepared batch polymerized high pressure polyethylene have been found to correlate well with molecular weight. These polymers have narrow and nearly constant molecular weight distributions and contain essentially no long‐chain branches. Short‐chain branching was found to have little or no effect on the relationships. Polyethylene made in the same reactor having long‐chain branches had melt and solution viscosity properties which deviated seriously from these relationships. The deviations serve as a semiquantitative measure of long‐chain branching. When long‐chain branching is absent, the correlations serve as rapid methods of determining M̄n for narrow‐distribution polymers.
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