When a quiescent molten polymer is cooled below the equilibrium melting temperature, crystals (spherulites) appear and keep growing as long as the temperature ranges between the melting temperature and the glass transition temperature. The crystallization process depends upon temperature and crystalline microstructure. In particular, the reduction of the free volume and subsequent impingement between crystals influence both nucleation and growth rates of spherulites. Below the glass transition temperature, the polymer consists of crystal and amorphous phases. In the sequel we discuss a mathematical model for a bidimensional isothermal crystallization process which takes into account the nucleation, growth, and impingement of spherulites.

Paolini, M., Caselli, R., Mazzullo, S., Verdi, C., Models, experiments, and numerical simulation of isothermal crystallization of polymers, Comunicazione, in Proceedings of the Seventh European Conference on Mathematics in Industry, (Montecatini-Terme, 02-06 March 1993), B. G. Teubner, Stuttgart 1994: 167-174 [http://hdl.handle.net/10807/25447]

Models, experiments, and numerical simulation of isothermal crystallization of polymers

Paolini, Maurizio;
1994

Abstract

When a quiescent molten polymer is cooled below the equilibrium melting temperature, crystals (spherulites) appear and keep growing as long as the temperature ranges between the melting temperature and the glass transition temperature. The crystallization process depends upon temperature and crystalline microstructure. In particular, the reduction of the free volume and subsequent impingement between crystals influence both nucleation and growth rates of spherulites. Below the glass transition temperature, the polymer consists of crystal and amorphous phases. In the sequel we discuss a mathematical model for a bidimensional isothermal crystallization process which takes into account the nucleation, growth, and impingement of spherulites.
1994
Inglese
Proceedings of the Seventh European Conference on Mathematics in Industry
Seventh European Conference on Mathematics in Industry
Montecatini-Terme
Comunicazione
2-mar-1993
6-mar-1993
Paolini, M., Caselli, R., Mazzullo, S., Verdi, C., Models, experiments, and numerical simulation of isothermal crystallization of polymers, Comunicazione, in Proceedings of the Seventh European Conference on Mathematics in Industry, (Montecatini-Terme, 02-06 March 1993), B. G. Teubner, Stuttgart 1994: 167-174 [http://hdl.handle.net/10807/25447]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10807/25447
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