Brookfield DV2+Pro Viscometer Instrukcja Użytkownika Pobierz pdf (Strona 56)

Brookeld Engineering Labs., Inc. Page 56 Manual No. M03-165-F0612

Figure V1-13: Custom Screen

V1.3 Math Models

Note: SomeorallofthesemodelsareavailableinWingatherorRheocalc.

Math models provide parameters that indicate how materials will behave in various circumstances

where shear stress and shear rate vary. The data and calculated model parameters can be used

to help QC and R&D characterize how a product will behave for the customer and how it will

behave during processing.

When selecting a math model, it is important to take into consideration the parameters that need

tobemeasured,aswellas,thecondenceoft(CoF).ACoFabove98isrecommended.This

appendix discusses the parameters of the following four models, what kinds of materials they

should be used with, and provides an example of each. All models discussed are available with

Brookeld’sRheocalc™,Wingather™,andRHEO3000™software.

• Power Law (Ostwald)

• Herschel-Bulkley

• Bingham

• Casson

Inadditiontotheabovemodels,thisappendixalsobrieycoverstheNCA/CMACassonmodel

and the IPC Paste Model. These can be found at the end of this section.

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Brookfield DV2+Pro Viscometer Instrukcja Użytkownika Strona 56