## Abstract The reaction kinetics of the postamidation of polyamide 6 in the melt was studied by a new rheological method, and the reaction rate constant was calculated to be about 0.087 kg/mol min at 250ยฐC. To study the effects of the shear flow on a homogeneous polymeric reaction, a more practica
Homogeneous flow field effect on the control of Maxwell materials
โ Scribed by Hong Zhou; Wei Kang; Arthur Krener; Hongyun Wang
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 171 KB
- Volume
- 150
- Category
- Article
- ISSN
- 0377-0257
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โฆ Synopsis
The controllability of viscoelastic fields is a fundamental concept that defines some essential capabilities and limitations of the resulting materials. In this paper, we study the controllability of different homogeneous flow fields of viscoelastic fluids governed by the upper convected Maxwell model. The approach is largely based on the nonlinear geometric control theory. Through the analysis of the control Lie algebra, we find the submanifolds in the state space on which the homogeneous flow fields are weakly controllable. Our approach can be generalized to more complicated systems.
๐ SIMILAR VOLUMES
Colloid-colloid interactions are important in understanding the macroscopic properties of flowing suspensions. In many processes of technological and biological interest, it is important to identify conditions which promote or inhibit colloidal aggregation. In this paper, we use trajectory amalysis