Study of Shear Stress Relaxation in Well-Characterized Polymer Liquids

Christine Mary Vrentas, William W. Graessley

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Shear stress relaxation data were measured for a range of shear strains on several entangled polymer liquids in order to test time-strain factorability and the Doi-Edwards predictions about strain dependence. Undiluted samples and concentrated solutions of well-characterized linear and star poly butadienes with narrow molecular weight distributions were used. Some departures from time-strain factorability were found, but these appear to be nonsy sterna nonsystematic i.e., they do not correlate in any obvious way with the polymer structure. The strain dependence, however, follows the pattern observed by Osaki and Kurata for polystyrene solutions. The Doi-Edwards prediction gives a good account of the results at intermediate entanglement densities (35,000 < cM < 150,000 for linear and star polybutadienes), but systematic departures are found at higher values. The causes of the latter are unknown.

Original languageEnglish (US)
Pages (from-to)359-371
Number of pages13
JournalJournal of Rheology
Volume26
Issue number4
DOIs
StatePublished - Jan 1 1982

Fingerprint

stress relaxation
Stress relaxation
shear stress
Shear stress
Polymers
sternum
stars
polybutadiene
shear strain
polymers
Liquids
butadiene
liquids
predictions
Stars
molecular weight
polystyrene
Butadienes
causes
Polybutadienes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Vrentas, Christine Mary ; Graessley, William W. / Study of Shear Stress Relaxation in Well-Characterized Polymer Liquids. In: Journal of Rheology. 1982 ; Vol. 26, No. 4. pp. 359-371.
@article{c44c80d871b54bd9a7ff3761206cded9,
title = "Study of Shear Stress Relaxation in Well-Characterized Polymer Liquids",
abstract = "Shear stress relaxation data were measured for a range of shear strains on several entangled polymer liquids in order to test time-strain factorability and the Doi-Edwards predictions about strain dependence. Undiluted samples and concentrated solutions of well-characterized linear and star poly butadienes with narrow molecular weight distributions were used. Some departures from time-strain factorability were found, but these appear to be nonsy sterna nonsystematic i.e., they do not correlate in any obvious way with the polymer structure. The strain dependence, however, follows the pattern observed by Osaki and Kurata for polystyrene solutions. The Doi-Edwards prediction gives a good account of the results at intermediate entanglement densities (35,000 < cM < 150,000 for linear and star polybutadienes), but systematic departures are found at higher values. The causes of the latter are unknown.",
author = "Vrentas, {Christine Mary} and Graessley, {William W.}",
year = "1982",
month = "1",
day = "1",
doi = "10.1122/1.549686",
language = "English (US)",
volume = "26",
pages = "359--371",
journal = "Journal of Rheology",
issn = "0148-6055",
publisher = "Society of Rheology",
number = "4",

}

Study of Shear Stress Relaxation in Well-Characterized Polymer Liquids. / Vrentas, Christine Mary; Graessley, William W.

In: Journal of Rheology, Vol. 26, No. 4, 01.01.1982, p. 359-371.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Study of Shear Stress Relaxation in Well-Characterized Polymer Liquids

AU - Vrentas, Christine Mary

AU - Graessley, William W.

PY - 1982/1/1

Y1 - 1982/1/1

N2 - Shear stress relaxation data were measured for a range of shear strains on several entangled polymer liquids in order to test time-strain factorability and the Doi-Edwards predictions about strain dependence. Undiluted samples and concentrated solutions of well-characterized linear and star poly butadienes with narrow molecular weight distributions were used. Some departures from time-strain factorability were found, but these appear to be nonsy sterna nonsystematic i.e., they do not correlate in any obvious way with the polymer structure. The strain dependence, however, follows the pattern observed by Osaki and Kurata for polystyrene solutions. The Doi-Edwards prediction gives a good account of the results at intermediate entanglement densities (35,000 < cM < 150,000 for linear and star polybutadienes), but systematic departures are found at higher values. The causes of the latter are unknown.

AB - Shear stress relaxation data were measured for a range of shear strains on several entangled polymer liquids in order to test time-strain factorability and the Doi-Edwards predictions about strain dependence. Undiluted samples and concentrated solutions of well-characterized linear and star poly butadienes with narrow molecular weight distributions were used. Some departures from time-strain factorability were found, but these appear to be nonsy sterna nonsystematic i.e., they do not correlate in any obvious way with the polymer structure. The strain dependence, however, follows the pattern observed by Osaki and Kurata for polystyrene solutions. The Doi-Edwards prediction gives a good account of the results at intermediate entanglement densities (35,000 < cM < 150,000 for linear and star polybutadienes), but systematic departures are found at higher values. The causes of the latter are unknown.

UR - http://www.scopus.com/inward/record.url?scp=0020165632&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020165632&partnerID=8YFLogxK

U2 - 10.1122/1.549686

DO - 10.1122/1.549686

M3 - Article

VL - 26

SP - 359

EP - 371

JO - Journal of Rheology

JF - Journal of Rheology

SN - 0148-6055

IS - 4

ER -