Rheological analysis

Rheological data can provide useful information about the influence of filler type, content and surface treatment on the overall melt viscosity of polymer containing particulate additive. Many reports exist describing these effects [44-46]. 

On-line rheometers are also available, suitable for use with continuous compounding lines, such as co-rotating twin-screw extrusion processes. Exploratory work has been 

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Rheological Analysis of the Processes of Film Molding from Melts... 

Mzelsky AI (1980) Rheological analysis of the process of film canvas molding from molten polymer. In Fridman ML (ed) Rheology in polymer processing. NPO Plastic, Moscow, pp71-84... 

The solid-like properties may be measured by non-destructive dynamic rheology analysis or by destructive methods using a Penetrometer, Jelly Tester, Instron instruments, or other types of texture analyzers. The latter methods are the most useful due to their simplicity and speed. Texture analysis of whippable emulsion must always be compared with the amount of air incorporated into the foam, which is known as percentage overrun and is calculated as follows ... 

TA Instruments, Inc. (1995a). Thermal Analysis and Rheology Analysis of Polymer Decomposition by TGA-Mass Spectrometry, New Castle, DE. 

Z. Tadmor and R. B. Bird, Rheological Analysis of Stabilizing Forces in Wire-Coating Dies, Polym. Eng. 

Fong-Spaven, F., and Hollenbeck, R. G. (1986), Thermal rheological analysis of triethanolamine-stearate stabilized mineral oil in water emulsions, Drug Dev. Ind. Pharm., 12, 289. 

E. Masuko, H. Homma, H. Ohta, S. Nojiri, R. Koyama, and Y. Niitsu, Rheologic Analysis of Gastric Mucosal Hemodynamics in Patients with Cirrhosis, Gastrointestinal Endoscopy, 49(3), 371-379 (1999). 

There is also a variety of wall-slip techniques used in rheological analysis (Gupta, 2000). The methods described here are flow visualization, capillary flow and torsional flow. 

Standards for the chemoviscosity of reactive fluids are shown in Table 4.5. Clearly these tests mainly are typical of rapid, quality-control measurements however, in contrast the standard proposed by Rydes (1993) for using capillary and slit-die rheometry is based on true rheological analysis. Alternative rheometers used for reactive systems are summarized in detail in Table 4.6. 

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