DOI: 10.1002/aic.690160219. Effect of molecular weight distribution on the shear dependence of viscosity in polymer systems

Effect of molecular weight distribution on the shear dependence of viscosity in polymer systems

10.1002/aic.690160219

Crossref journal-article

Wiley

AIChE Journal (311)

Abstract

AbstractThe viscosity of concentrated solutions of polystyrene were measured in steady shearing flow with a Weissenberg rheogoniometer. The polymers ranged in weight average molecular weight M̄w from 97,000 to 3,370,000 and in distribution breadth M̄w/M̄n from 1.05 to 3.1. The solvent was n‐butylbenzene, and the solutions ranged in concentration from 0.20 to 0.55 g./cc. These data were supplemented by measurements on bulk polystyrenes and polyethylenes with distribution breadths as high as M̄w/M̄n = 20. Master curves of reduced viscosity vs. reduced shear rate were calculated theoretically for each molecular weight distribution. The experimental viscosity data superimposed satisfactorily on these curves and furnished the viscosity at zero shear rate τ0 and an experimental time constant τ0 for each solution. The time constant paralleled closely the Rouse relaxation time τR in all systems. Residual variations in the ratio τ0/τR with molecular weight and concentration correlated uniquely with the product cM̄w. These results indicate that the viscosity behavior of a polymer can be predicted with reasonable accuracy from data on its molecular weight distribution.

Bibliography

Graessley, W. W., & Segal, L. (1970). Effect of molecular weight distribution on the shear dependence of viscosity in polymer systems. AIChE Journal, 16(2), 261â267. Portico.

Authors 2

William W. Graessley (first)
Leon Segal (additional)

References 26 Referenced 47

Alberino L. M. Ph.D. thesis Northwestern Univ. Evanston Ill. (1966).
{'key': 'e_1_2_1_3_2', 'volume-title': 'Physical Properties of Polymers', 'author': 'Bueche F.', 'year': '1962'} / Physical Properties of Polymers by Bueche F. (1962)
10.1002/pol.1958.1203212414
10.1016/0095-8522(55)90024-6
10.1149/1.2428174
{'key': 'e_1_2_1_7_2', 'volume-title': 'Principle of Polymer Chemistry', 'author': 'Flory P. J.', 'year': '1953'} / Principle of Polymer Chemistry by Flory P. J. (1953)
10.1063/1.1725872
10.1007/BFb0050985
Gandhi A. M. S. thesis Northwestern Univ. Evanston Ill. (1966).
10.1063/1.1697198
10.1063/1.1712222
10.1122/1.549089
10.1038/200646a0
10.1002/pol.1967.110051204
10.1007/BF01973576
{'key': 'e_1_2_1_17_2', 'first-page': '797', 'volume': '2', 'author': 'Kraus G.', 'year': '1964', 'journal-title': 'J. Polymer Sci., Part A'} / J. Polymer Sci., Part A by Kraus G. (1964)
10.1002/pol.1959.1203613019
{'key': 'e_1_2_1_19_2', 'volume-title': 'Elastic Liquids', 'author': 'Lodge A. S.', 'year': '1964'} / Elastic Liquids by Lodge A. S. (1964)
10.1002/app.1967.070110309
10.1021/cr60239a001
10.1122/1.549067
{'key': 'e_1_2_1_23_2', 'first-page': '793, 800', 'volume': '26', 'author': 'Ree T.', 'year': '1955', 'journal-title': 'J. Appl. Phys.'} / J. Appl. Phys. by Ree T. (1955)
10.1016/0021-9797(66)90047-6
10.1002/pen.760070413
10.1002/aic.690120606
10.1002/aic.690130324

Dates

Type	When
Created	21 years, 2 months ago (June 23, 2004, 3:28 a.m.)
Deposited	1 year, 9 months ago (Nov. 1, 2023, 10:39 a.m.)
Indexed	4 months, 3 weeks ago (March 31, 2025, 10:04 a.m.)
Issued	55 years, 5 months ago (March 1, 1970)
Published	55 years, 5 months ago (March 1, 1970)
Published Online	21 years, 2 months ago (June 17, 2004)
Published Print	55 years, 5 months ago (March 1, 1970)

Funders 0

None

BibTeX

@article{Graessley_1970, title={Effect of molecular weight distribution on the shear dependence of viscosity in polymer systems}, volume={16}, ISSN={1547-5905}, url={http://dx.doi.org/10.1002/aic.690160219}, DOI={10.1002/aic.690160219}, number={2}, journal={AIChE Journal}, publisher={Wiley}, author={Graessley, William W. and Segal, Leon}, year={1970}, month=mar, pages={261–267} }

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