Monitoring of small-scale anionic polymerization of caprolactam; a method to be used in an additive manufacturing process
| Autor: | Marianne Gilbert, Philip Dickens, Khosrow Khodabakhshi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Polymers and Plastics Bulk polymerization Radical polymerization technology industry and agriculture Solution polymerization macromolecular substances Chain-growth polymerization Anionic addition polymerization Chemical engineering Polymerization Polymer chemistry Precipitation polymerization Suspension polymerization |
| Zdroj: | Polymers for Advanced Technologies. 24:503-510 |
| ISSN: | 1042-7147 |
| DOI: | 10.1002/pat.3112 |
| Popis: | The anionic polymerization of caprolactam using small quantities of reactants was investigated as part of a project aimed at producing polyamide parts by additive manufacturing. Various methods were used to monitor the polymerization and crystallization processes. Drop on drop small-scale polymerization was carried out on a hot surface and monitored by Fourier transform infrared, which showed that PA6 had been polymerized successfully. PA6 synthesis was carried out in a differential scanning calorimetry cell to monitor the exothermic and endothermic processes during polymerization, and the processes were also observed by hot stage microscopy. It was found that polymerization and crystallization occurred simultaneously at slow heating rates. The amount of crystallinity produced during polymerization decreased as the heating rate increased. Copyright © 2013 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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