How Chain Transfer Leads to a Uniform Polymer Particle Morphology and Prevents Reactor Fouling
| Autor: | Lidia Jasinska-Walc, Miloud Bouyahyi, Amin Syed, Rob Duchateau, Joey Aarts, Erik Rene Delsman |
|---|---|
| Přispěvatelé: | Product Technology |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Heptane Materials science Polymers and Plastics Fouling Precipitation (chemistry) Organic Chemistry Chain transfer Polymer law.invention Inorganic Chemistry chemistry.chemical_compound chemistry Chemical engineering Polymerization Transfer agent law Materials Chemistry Crystallization |
| Zdroj: | Macromolecules, 54(2), 696-702. AMER CHEMICAL SOC |
| ISSN: | 0024-9297 |
| Popis: | The effect of adding diethyl zinc as a chain transfer agent during the polymerization of propylene in heptane performed at 80 degrees C was studied. Although it was expected that the chain transfer would stop after precipitation of the polymer, the polymer molecular weight continued to increase throughout the whole of the polymerization. The presence of diethyl zinc had an additional effect that the polymerizations were devoid of reactor fouling. To unravel this phenomenon, the polymer particle morphology was studied. Under the conditions applied, surprisingly, uniform platelet-shaped polymer particles were formed. At high polymer content, these particles aggregate into microfibrillar structures consisting of nematic columnar strands of the same uniform platelets. The polymer particle morphology, as a result of controlled crystallization, is believed to play a crucial role in preventing reactor fouling. |
| Databáze: | OpenAIRE |
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