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Based on successive multiple-step isothermal crystallization and self-nucleation annealing methods, a novel semi-quantitative method for the characterization of segment distribution in linear low density polyethylene (LLDPE) wasestablished by treating the thermal analysis data using the Gibbs-Thomson equation. The method was used to describe thesegment distribution of Ziegler-Natta catalyzed LLDPE (Z-N LLDPE), metallocene catalyzed LLDPE (m-LLDPE) and twoconunercial LLDPEs with wide molecular weight distribution. The differences of the results obtained from the two thermallytreated samples were compared. The results of segmeni distribution of the polymers were discussed according to theirmicrostructure data and were compared with their characteristics. It can be deduced from the results that this characterizationmethod is effective to characterize the sequence structure of the branched ethylene copolymers.
Based on successive multiple-step isothermal crystallization and self-nucleation annealing methods, a novel semi-quantitative method for the characterization of segment distribution in linear low density polyethylene (LLDPE) wasestablished by treating the thermal analysis data using the Gibbs-Thomson equation. method was used to describe these segment distribution of Ziegler-Natta catalyzed LLDPE (ZN LLDPE), metallocene catalyzed LLDPE (m-LLDPE) and twoconunercial LLDPEs with wide molecular weight distribution. The differences of the results obtained from the two thermallytreated samples were compared. results of segmeni distribution of the polymers were discussed according to their microstructure data and were compared with their characteristics. It can be deduced from the results that this characterizationmethod is effective to characterize the sequence structure of the branched ethylene copolymers.