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Viscoelastic properties of entangled polymers - Ternary blends of monodisperse homopolymersIn a previous publication from this laboratory, the Rouse-Bueche-Zimm molecular theory of viscoelasticity has been extended by using a transient network model to apply to binary blends of monodisperse polymers with chain entanglements. The dynamics of the entanglements were modeled both by the enhanced frictional coefficients and by the additional elastic couplings. It was recognized that entanglements not only may form between chains of the same lengths (intracomponent entanglements) but also between those of different lengths (intercomponent entanglements). At a given intercomponent entanglement, the longer chain was assumed to have the frictional coefficient of the shorter chain. Similarly, for blends consisting of several monodisperse components with different molecular weights, such modifications are also required to predict their linear viscoelastic behavior. The frequency of these interactions is assumed to be proportional to the weight ratio of the respective component chains in the blend. Equations of motion are formulated for each component and solved numerically for the relaxation time spectra. Linear viscoelastic properties such as the dynamic mechanical moduli, stress relaxation moduli, and zero-shear viscosity can then be computed for these systems by linear summation of those of the components.
Document ID
19800048483
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Soong, D.
(California Univ. Berkeley, CA, United States)
Shen, M.
(California, University Berkeley, Calif., United States)
Hong, S. D.
(California Univ. Berkeley, CA, United States)
Moacanin, J.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Shyu, S. S.
(California Univ. Berkeley, CA, United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1979
Publication Information
Publication: Journal of Applied Physics
Volume: 50
Subject Category
Nonmetallic Materials
Accession Number
80A32653
Distribution Limits
Public
Copyright
Other

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