Viscoelastic characterization of corn starch paste: (II) The first normal stress difference of a cross-linked waxy corn starch paste
The power-law strain model used to characterize the first normal stress difference (N 1) was checked here second based on the experimental linear viscoelastic properties, steady shear viscosities, and N 1s of two cross-linked waxy corn starch pastes reported in 2003. Pa...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2025-06-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/arh-2025-0046 |
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| Summary: | The power-law strain model used to characterize the first normal stress difference (N
1) was checked here second based on the experimental linear viscoelastic properties, steady shear viscosities, and N
1s of two cross-linked waxy corn starch pastes reported in 2003. Parameter f in a structured integral viscoelastic constitutive equation was obtained using the viscosities in the dynamic and steady shear experiments, and both the original and power-law strain models were employed to describe the normal component in the strain matrix of the equation and the N
1s of the two pastes. The results showed that the three types of viscoelastic properties of the paste can be described well by the structured equation including the power-law strain model. In contrast, the descriptions of N
1s based on the original strain model have huge deviation from the experiments for both pastes, which are similar to the first characterization of N
1 of corn starch paste with sucrose in 2022. |
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| ISSN: | 1617-8106 |