Parameter-Free Theory for Stress Relaxation in Star Polymer Melts

Parameter-Free Theory for Stress Relaxation in Star Polymer Melts

We present a theory of stress relaxation in star polymer melts with no adjustable parameters beyond those measurable in linear melts. We incorporate the effect of higher Rouse modes on star arm retraction and the Colby−Rubinstein scaling of entanglement length within “dynamic dilution”. Our results...

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Veröffentlicht in:Macromolecules 1997-04, Vol.30 (7), p.2159-2166
Hauptverfasser: Milner, S. T, McLeish, T. C. B
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Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Rheology and viscoelasticity
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creator Milner, S. T
McLeish, T. C. B
description We present a theory of stress relaxation in star polymer melts with no adjustable parameters beyond those measurable in linear melts. We incorporate the effect of higher Rouse modes on star arm retraction and the Colby−Rubinstein scaling of entanglement length within “dynamic dilution”. Our results for G‘‘(ω) compare well with experimental data, with excellent agreement in shape and within a factor of 2 in time and modulus scales.
doi_str_mv 10.1021/ma961559f
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source American Chemical Society Journals
subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Rheology and viscoelasticity
title Parameter-Free Theory for Stress Relaxation in Star Polymer Melts
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