| Autor: |
Costas Kiparissides, Øivind Moen, Prokopis Pladis |
| Rok vydání: |
2006 |
| Předmět: |
|
| DOI: |
10.1016/s1570-7946(06)80013-1 |
| Popis: |
This chapter illustrates that Molecular Weight Distributions can be determined from linear viscoelastic melt properties (shear storage modulus G' (ɷ) and the stress relaxation modulus G (t). A method for the determination of Molecular Weight Distributions from viscosity-shear rate data would have the following two advantages: (1) A piston rheometer can be utilized to perform the necessary measurements. These rheometers are more convenient in use and are more robust instruments than the mechanical spectrometers that are used to measure G(ɷ) and G (t). (2) In order to use the G' (o) and G (t) methods it is essential that the Plateau modulus (G N 0 ) must be known. This is a very difficult, and sometimes impossible, quantity to measure. A knowledge of the Plateau modulus (G N 0 ) is not required for the viscosity method that is addressed in the chapter. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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