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Rheological quantification of molecular parameters: Application to a hydrogen bond forming blend
Author(s) -
Cai Haijun,
AitKadi Abdellatif,
Brisson Josée
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20613
Subject(s) - ethylene oxide , materials science , rheology , polymer blend , hydrogen bond , plateau (mathematics) , volume fraction , viscosity , polymer chemistry , thermodynamics , phase (matter) , oxide , molecule , composite material , polymer , chemistry , copolymer , organic chemistry , physics , mathematical analysis , mathematics , metallurgy
The component dynamics and molecular parameters were investigated for miscible poly(4‐vinyl phenol)/poly(ethylene oxide) (PVPh/PEO) blends. Global values of molecular weight between entanglements ( M e ) were first estimated for the blends and were compared with existing athermal model predictions. Global interchain friction coefficients (ξ) of the blends were deduced from the zero‐shear viscosity. A maximum was observed at a composition of 20–30 wt % of PEO. Chain dimensions of this phase are estimated by using a relationship between the plateau modulus and a packing length (i.e., number of individual chains present in a given small volume of the melt). A slight increase in M e is observed at low PEO weight fraction (before 0.20), followed by a sharp decrease in M e values after this concentration. Values of ξ in PVPh/PEO blends show a maximum value at 20–30 wt % of PEO. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1623–1630, 2004
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