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Digitale Medien

Evaluation of steady-state flow curves from model molecular weight distributions (1973)

Cote, J. A. ; Shida, M.

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 17 (1973), S. 1639-1650

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Details

ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Graessley's theory of entanglement was applied to several model distributions. The distribution functions chosen were such that the differential weight distributions were triangular with respect to a log molecular weight axis. The molecular weight level, breadth of the molecular weight distribution, skewness, and blending of simple distributions were studied in their effect on the steady-state flow curve. The governing factor for the shape of the reduced flow curve was shown to be M̄z+1·M̄z/M̄w2. Other general features of the flow curve predicted by Graessley's theory were discussed.

Zusätzliches Material: 10 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1973.070170601

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Digitale Medien

Long-chain branching in low-density polyethylene (1971)

Cote, J. A. ; Shida, M.

New York : Wiley-Blackwell

Journal of Polymer Science Part A-2: Polymer Physics 9 (1971), S. 421-430

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Details

ISSN: 0449-2978

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: A method is given for the analysis of long-chain branching in polymers by using combined GPC and intrinsic viscosity measurements. A computer program was written to evaluate branching indices by a tabular, iterative method. The method was applied to the evaluation of long-chain branching in low-density polyethylene.

Zusätzliches Material: 4 Ill.