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As a result of the very high co-monomer content and homogeneous short branch distributions made possible by the metallocene catalyst, superior low temperature mechanical properties are possible. We have studied a series of these polymers varying in density from 0.87 to 0.92 kg l -1 using dynamic mechanical analysis. Compared with conventional polyethylenes, the beta relaxation was shifted...
Recent advances in metallocene catalysts have created a rich set of structural variations for polyethylenes. Copolymers of unprecedented comonomer content and branching distribution have been commercialized. In this paper, we report progress in our laboratories in characterizing these parameters. For polymers of moderate to high crystallinity, differential scanning calorimetry (DSC) provided very...
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