Flow of Molten Polymers Used in the Synthetic Fibre Industry Through Granular Beds

Kembłowski, Z.; Michniewicz, M.; Torzecki, J.

doi:10.1007/978-1-4684-3746-1_25

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Part B: Considerations From the Point Of View Of Zero-shear-1

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2001

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Cited by 5 publications

(2 citation statements)

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“…(A-11) which in a semi-logarithmic coordinate system lnr/ot vs. t describes a family of straight lines of different slope (depending on the numerical value of rate constant k) and the common point of intersection on the ordinate axis lnr/0,0 -see figures 1, 3 and 5 (similar results were obtained by other authors, cf. [2,21,30,32,34,36]). …”

Section: Part B: Considerations From the Point Of View Of Zero-shear-mentioning

confidence: 98%

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Determination of the weight-average molecular weight of polyamide-6 on the basis of melt viscosity

Kembłowski

Torzecki

1983

Rheol Acta

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A theory of a two-point rheometrical method of determination of the weight-average molecular weight M w of polyamide-6 is presented. The method is based on the measurement of the instantaneous values of zero-shear-rate viscosity of the degrading polymer melt, and a formula is derived which enables the calculation of the initial value of Mw (i.e. at zero-residence-time in molten state) of the investigated sample. The experimental verification of the method proves its applicability. The considerations carried out may be regarded as a first step towards developing a theory of an in-line rheometer for a continuous determination of M w .

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Section: Part B: Considerations From the Point Of View Of Zero-shear-mentioning

confidence: 98%

“…It was shown in our previous paper [2] that the instantaneous flow curve of molten PA-6 (i.e. the flow curve at an arbitrary residence time in molten state t) may be described by the following formula:…”

Section: Theoreticalmentioning

confidence: 99%