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The influence of intermolecular hydrogen bonding on the flow behavior of polymer melts
Author(s) -
Blyler L. L.,
Haas T. W.
Publication year - 1969
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.1969.070131219
Subject(s) - materials science , hydrogen bond , shear rate , extrusion , viscosity , polymer , composite material , capillary action , intermolecular force , rheometer , shear (geology) , hydrogen , activation energy , polymer chemistry , rheology , thermodynamics , chemistry , organic chemistry , molecule , physics
The influence of hydrogen bonding on the flow behavior of polymer melts at high shear rate has been investigated using a capillary extrusion rheometer. The systems studied were copolymers of ethylene and acrylic or methacrylic acid. Hydrogen bonding was found to substantially enhance both flow activation energy and viscosity level, as well as the degree of dependence of viscosity on rate of shear. It was also found that hydrogen bonding does not influence the critical shear stress for onset of “melt fracture.” The data support the view that hydrogen bonds act effectively as temporary (quasi‐) crosslinks during the short time scales of deformation involved in flow at high shear rates.