Nucleation of Polymer Droplets
| Autor: | Alan G. Walton, J. A. Koutsky, Eric Baer |
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| Rok vydání: | 1967 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 38:1832-1839 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | The nucleation of droplets of polyethylene, polyethylene oxide, polyoxymethylene, nylon 6, poly (3,3‐bis‐chloromethyloxacyclobutane), isotactic polypropylene, and isotactic polystyrene, suspended in silicone oil, has been investigated. Under conditions of slow cooling (0.1°C/min), two different phenomena were observed; occasional droplet solidification at low degrees of subcooling, the number of droplets solidified and the temperature at which nucleation occurred being a function of the thermal melt history; and a sudden catastrophic, history‐independent, nucleation phenomenon at large subcooling. The latter event may be identified as a critical phenomenon occurring at a subcooling ΔTc which is only slightly dependent upon the rate of cooling.For polyethylene and isotactic polypropylene, the ΔTc's correspond closely with values obtained by other authors using different suspending media and have been identified with homogeneous nucleation. Homogeneous nucleation may also be explored by the method of kineti... |
| Databáze: | OpenAIRE |
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