Polymer crystallization molecular segregation

Addison A, Ribeiro M, Deffieux A, Fontanille M (1992) Polymer 33(20) 4337 Miiller AJ, Hernandez ZH, Amal ML, Sanchez JJ (1997) Successive self-nucleation/ aimealing (SSA) a novel technique to study molecular segregation during crystallization. Polym Bull 39 465 72... 

Cheng SZD, Noid DW, Wunderlich B (1989) Molecular Segregation and Nucleation of Poly(elhylaie oxide) Crystallized from the Melt. IV. Computer Modeling. J Polymer Sd Part B Polymer Phys 27 1149-1160. 

Hu WB (2005) Molecular segregation in polymer melt crystallization simulation evidence and unified-scheme interpretation. Macromolecules 38 8712-8718 Hu WB, Cai T (2008) Regime transitions of polymer crystal growth rates molecular simulations and interpretation beyond Lauritzen-Hoffman model. Macromolecules 41 2049-2061 Jeziomy A (1971) Parameters characterizing the kinetics of the non-isothermal crystallization of poly(ethylene terephthalate) determined by DSC. Polymer 12 150-158 Johnson WA, Mehl RT (1939) Reaction kinetics in processes of nucleation and growth. Trans Am Inst Min Pet Eng 135 416-441... 

Abstract. We review how the nucleation mechanism of polymer crystallization could be assigned to intramolecular processes and what are the preliminary benefits for understanding some fundamental crystallization behaviors. The speculative concept of molecular nucleation and the theoretical model of intramolecular nucleation have been elucidated in a broad context of classical nucleation theory. The focus is on explaining the phenomenon of molecular segregation caused by polymer crystal growth. 

Besides molecular segregation (Hu 2005), many other phenomena unique for polymer crystal growth also favor the intramolecular nucleatimi model, such as co-crystallization of long and short chains (Cai et al. 2008 Jiang et al. 2015) as well as the interpretation of regime transitions (Hu and Cai 2(X)8). 

Cheng SZ, Wunderlich B (1986) Molecular segregation and nucleation of poly (ethylene oxide) crystallized from the melt. I. Calorimetric study. J Polym Sci B 24(3) 577-594 Coleman BD (1958) On the properties of polymers with random stereo-sequences. J Polym Sci 31 (122) 155-164... 

Hu W (1998) Structural transformation in the collapse transition of the single flexible homopolymer model. J Chem Phys 109(9) 3686-3690 Hu W (20(X)) The melting point of chain polymers. J Chem Phys 113(9) 3901-3908 Hu W (2005) Molecular segregation in polymer melt crystallization simulation evidence and unified-scheme interpretation. Macromolecules 38(21) 8712-8718 Hu W (2007) Intramolecular crystal nucleation. In Reiter G, Strobl GR (eds) Lecture notes in physics progress in understanding of polymer crystallization. Springer, Berlin, pp 47-63 Hu W (2013) Polymer physics a molecular approach. Springer, Wien... 

Hu W. Molecular segregation in polymer melt crystallization Simulation evidence and unified-scheme interpretation. Macromolecules 2005 38 8712-8718. 

For a semi-crystalline polymer the solidification model of Fischer [11] predicts that the chain dimensions are frozen in at Tm if crystallization occurs sufficiently fast so as to prevent the disentanglement of chains by unravelling and/or their segregation according to their mass. For a series of polyethylene samples Michler [12] has accomplished an instructive comparison between the dimensions of molecular coils and the thickness of crystalline lamellae (Fig. 4). 

---