Simulation of crystallization of isotactic polypropylene with different shear regimes
| Autor: | Christian Hopmann, Marcel Spekowius, Roberto Spina |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Multiscale
Materials science Crystallization of polymers Nucleation 02 engineering and technology 010402 general chemistry 01 natural sciences Isothermal process law.invention Condensed Matter::Materials Science Differential scanning calorimetry law Tacticity Physical and Theoretical Chemistry Composite material Crystallization Polymer Instrumentation chemistry.chemical_classification Rheometry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Condensed Matter::Soft Condensed Matter chemistry 0210 nano-technology |
| Popis: | Flow induced crystallization is an important process during polymer solidification because it strongly influences the material morphology and properties. The melt of isotactic polypropylene crystallizes slowly in isothermal conditions whereas shear conditions speed up the crystallization process. The main objective of the presented research is the investigation of the shear-induced crystallization of isotactic polypropylene through a comparative analysis between isothermal and non-isothermal conditions in different shear regimes. A numerical simulation of crystallization kinetics of semicrystalline thermoplastics with a multiscale model is proposed to evaluate the nucleation and growth of spherulites, after identifying the material parameters needed to connect crystallization kinetics to the molecular material properties. This model is validated by using data from differential scanning calorimetry (DSC) and a rotational rheometry (RHEO). |
| Databáze: | OpenAIRE |
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