Preparation of small poly(butylene terephthalate) spheres by crystallization from solution
| Autor: | Richard E. Robertson, Mark E. Nichols |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Birefringence
Morphology (linguistics) Diglycidyl ether Materials science Polymers and Plastics Nucleation Epoxy Condensed Matter Physics law.invention chemistry.chemical_compound Chemical engineering chemistry law visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium SPHERES Physical and Theoretical Chemistry Crystallization Phase diagram |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 32:573-577 |
| ISSN: | 1099-0488 0887-6266 |
| Popis: | The crystallization of poly(butylene terephthalate) (PBT) from moderately dilute solutions of PBT in a diglycidyl ether of bisphenol-A epoxy has been investigated. PBT dissolves in this epoxy approximately 35°C below its usual melting temperature of 227°C to form a one-phase solution. Cooling this solution below 165°C leads to rapid crystallization of the PBT. The resulting mixture of liquid epoxy and crystalline PBT has a low viscosity and contains highly birefringent, individual PBT spherulites. The PBT spherulites have a narrow size distribution and a high surface-to-volume ratio. These particles are suggested to arise from a rapid crystallization that follows liquid–liquid phase separation. © 1994 John Wiley & Sons, Inc. |
| Databáze: | OpenAIRE |
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