Spinodal-assisted crystallization in polymer melts

Details Spinodal-assisted crystallization in polymer melts Spinodal-assisted crystallization in polymer melts

1998-06-02

arxiv.org/abs/cond-mat/9806024v1

Physical Review Letters 81 (1998) 373-376

Physics

Condensed Matter

Soft Condensed Matter

5 pages, three figures, REVTEX, to be published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.81.373

Recent experiments in some polymer melts quenched below the melting temperature have reported spinodal kinetics in small-angle X ray scattering before the emergence of crystalline structure. To explain these observations we propose that the coupling between density and chain conformation induces a liquid-liquid binodal within the equilibrium liquid--crystalline solid coexistence region. A simple phenomenological theory is developed to illustrate this idea, and several experimentally testable consequences are discussed. Shear is shown to enhance the kinetic role of the hidden binodal.

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