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Coupling between kinetics and rheological parameters in the flow‐induced crystallization of thermoplastic polymers
Author(s) -
Acierno Stefano,
Coppola Salvatore,
Grizzuti Nino,
Maffettone Pier Luca
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200208)185:1<233::aid-masy233>3.0.co;2-w
Subject(s) - reptation , crystallization , rheology , materials science , crystallization of polymers , polymer , nucleation , thermodynamics , kinetics , work (physics) , chemical engineering , composite material , physics , classical mechanics , engineering
Flow Induced Crystallization (FIC) is the common term to indicate the acceleration in polymer crystallization kinetics due to the action of flow. FIC is expected to be the result of the coupling between the intrinsic (quiescent) crystallization kinetics and the rheological response of the polymer. The choice of a suitable rheological model, therefore, is a crucial requirement for a successful FIC model. Recent work of our group [1] has demonstrated that the Doi‐Edwards rheological model (DE), based on the concept of chain reptation, can be easily incorporated into classical crystallization models to successful predict the enhancement in nucleation rate under the action of a steady shear flow. In this paper, the interaction between the rheological parameters of the DE model and the crystallization kinetics parameters is investigated in more details. In particular, the effect of the crystallization temperature, which acts on both the polymer relaxation time and the free energy jump between liquid and solid phase, is determined and discussed.