抄録
A series of studies were made concerning the rheological behavior of the two polymer components with respect to their mechanical mixture and to the degree of mixing. And an investigation was made, as one of the series, of well annealed polypropylene and polyethylene, mechanically mixed, with respect to their behavior of relaxation from tensile stress, as a function of the fraction of polypropylene component.
From a dilatometoric experiment made by using an automatic recording apparatus, it was shown that the mixture had two melting regions corresponding to the original melting temperature of each component; this suggests that the mechanical mixture retains two characteristic phases of each component in its crystallized texture.
The parameter n representing the degree of mixing was evaluated from the stress relaxation data. Referring to the n value, it was concluded that the polypropylene-polyethylene systems are in a state of extremely poor mixture.
