Abstract
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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Literature cited
Extrusion [in Russian], Leningrad (1973).
The Weissenberg Rheogoniometer. Instruction Manual, Model R18, Sangamo Controls, Ltd. (1967).
Yu. G. Yanovskii and A. Ya. Malkin in: Advances in Polymer Rheology [in Russian], Moscow (1972), p. 52.
Additional information
"Plastpolimer" Nongovernmental Organization, Leningrad. Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 2. pp. 368–370, March–April, 1975.
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Bukhgalter, V.I., Tsirprin, M.G. & Yuzhin, Y.M. Flow of polyethylene melts with steadystate and recurrent deformation. Polymer Mechanics 11, 317–319 (1975). https://doi.org/10.1007/BF00854745
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DOI: https://doi.org/10.1007/BF00854745