AbstractThe objective of this work was to correlate rheological parameters with basic molecular parameters such as different molecular weights and level of long‐chain branching (LCB) in low density polyethylene. LCB is known to exert a considerable influence on resin's melt flow characteristics which have been useful in predicting resin end‐use properties (especially processability). In the scope of the work steady flow measurements were done with an Instron Rheometer and dynamic oscillatory measurements using a balance rheometer. The molecular weight data were obtained using gel permeation chromatography, light scattering technique, and solution viscosimetry. A correlation matrix was calculated for 34 measured properties. The results showed that good correlations may be obtained especially between LCB‐parameters, die swell and optical properties of the polymer. The LCB properties may also be quite correctly predicted from dynamic viscosity data at low freque