Read, D.J., McIlroy, C., Das, C. , Harlen, O.G. and Graham, R.S. (2020) PolySTRAND Model of Flow-Induced Nucleation in Polymers. Physical Review Letters, 124 (14). p. 147802. ISSN 0031-9007
Full content URL: https://doi.org/10.1103/PhysRevLett.124.147802
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polySTRAND.pdf - Whole Document 322kB |
Item Type: | Article |
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Item Status: | Live Archive |
Abstract
We develop a thermodynamic continuum-level model, polySTRAND, for flow-induced nucleation in polymers suitable for use in computational process modelling. The model's molecular origins ensure it accounts properly for flow and nucleation dynamics of polydisperse systems and can be extended to include effects of exhaustion of highly deformed chains and nucleus roughness. It captures variations with the key processing parameters, flow rate, temperature and molecular weight distribution. Under strong flow, long chains are over-represented within the nucleus, leading to super-exponential nucleation rate growth with shear rate as seen in experiments.
Keywords: | flow-enhanced crystallisation, polymer nucleation, Mathematical models, Continuum models |
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Subjects: | F Physical Sciences > F200 Materials Science G Mathematical and Computer Sciences > G150 Mathematical Modelling |
Divisions: | College of Science > School of Mathematics and Physics |
Related URLs: | |
ID Code: | 40194 |
Deposited On: | 08 Apr 2020 14:35 |
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