Flow of polyethylene melts with steadystate and recurrent deformation
1976
Results are presented of studies on melts of batches of polyethylene differing in overall molecular weight and branching. For high-density polyethylene, unlike the low-density material, the ratios between the tangential and normal stresses and between the constituents of the composite dynamic shear modulus are independent of temperature. A close agreement has been found between the total and net viscosity with cyclic vibration frequencies equal to the steady shear rate.
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