Abstract
Blends of isotactic polypropylene (iPP) and high density polyethylene (HDPE) at various compositions have been prepared in a mixer. Two different temperatures and various rotational speeds have been used in the experiments. Thermomechanical effects have been investigated through rheological measurements on the above blends. At the higher temperature, degradation occurs in all the samples and a synergistic effect of the thermal and mechanical degradations is observed. At the lower temperature iPP and iPP-rich blends also show degradative effects; HDPE and rich blends increase in viscosity, revealing slight crosslinking.
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