Abstract
Molecular dynamics simulations have been performed on models of polyethylene (and n-alkane) liquids at their realistic bulk densities. The united atom approximation has been adopted. On stepwise cooling of the system under a constant pressure, the temperature coefficient of specific volume changes abruptly at a temperature mimicking the glass transition phenomenon observed in laboratory. The results of the simulation runs, lasting for the order of nanoseconds, were analyzed to investigate the short time dynamics of bond reorientation. The distribution of bond reorientation angle is much broader than is expected from a rotational diffusion with a single diffusion coefficient. Similarly the time-correlation function of bond reorientation is non-exponential and can be fitted well by the stretched exponential function. Attempts to explain these behaviors by assuming a superposition of rotational diffusion processes is met with many contradictions. Explanation is instead offered on the basis of the observed anisotropy of the bond reorientation motion, i.e., the finding that the chain axis reorients much more slowly than a vector attached perpendicular to the chain axis. Such anisotropy results from the intramolecular and intermolecular constraints to the motion of the chain imposed by the segments in the neighborhood.
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References
Rigby D, Roe RJ (1987) J Chem Phys 87: 7285
Rigby D, Roe RJ (1988) J Chem Phys 89: 5280
Rigby D, Roe RJ (1989) J Macromolecules 22: 2259
Rigby D, Roe RJ (1990) J Macromolecules 23: 5312
Takeuchi H, Roe RJ, Mark JE (1990) J Chem Phys 93: 9042
Rigby D, Roe RJ (1991) In: Roe RJ (ed) Computer simulation of polymers. Prentice Hall, Englewood Cliffs, NJ, p 79
Takeuchi H, Roe RJ (1991) J Chem Phys 94: 7446
Takeuchi H, Roe RJ (1991) J Chem Phys 94: 7458
Roe RJ, Rigby D, Furuya H, Takeuchi H (1992) Comp Polymer Sci 2: 32
Weber TA, Helfand E (1979) J Chem Phys 71: 4760
Verlet L (1967) Phys Rev 159: 98
Pant PVK, Boyd RH (1992) Macromolecules 25: 494
Toxvaerd S (1990) J Chem Phys 93: 4290
Theodorou DN, Suter UW (1985) Macromolecules 18: 1467
Flory PJ (1969) Statistical mechanics of chain molecules. Wiley-Interscience, New York
Clarke JHR, Brown D (1989) Mol Sim 3: 27
Fox H, Andersen HC (1984) J Phys Chem 88: 4019
Ferry JD (1980) Viscoelastic properties of polymers, 3rd edition. Wiley, New York
Bero CA, Plazek DJ (1991) J Polymer Sci, Part B, Polymer Phys 29: 39
Ichimura I, Ogita N, Ueda A (1978) Japan J Phys Soc 45: 252
Hiwatari Y (1982) J Chem Phys 76: 5502
Geil PH (1976) J Macromol Sci, Phys Ed 12: 173
Wang CS, Yeh GSY (1978) J Macromol Sci, Phys Ed 15: 107
Pechhold WR, Grossman HP (1979) Faraday Disc Chem Soc 68: 58
Flory PJ (1979) Faraday Disc Chem Soc 68: 14
Patterson GD, Kennedy AP, Latham JP (1977) Macromolecules 10: 667
Fischer EW, Strobl GR, Dettenmaier M, Stamm M, Steidle H (1979) Faraday Disc Chem Soc 68: 26
Jarry JP, Monnerie L (1978) J Polymer Sci, Polymer Phys Ed 16: 443
Thulstrup EW, Michl J (1982) J Am Chem Soc 104: 5594
Kornfield JA, Fuller GG, Pearson DS (1989) Macromolecules 22: 1334
Jacobi MM, Stadler R, Gronski W (1986) Macromolecules 19: 2884
Sotta P, Deloche B, Herz J, Lapp A, Durand D, Rabadeux J-C (1987) Macromolecules 20: 2769
Schmidt C, Wefing S, Blümich B, Spiess HW (1986) Chem Phys Lett 130: 84
Wefing S, Kaufmann S, Spiess HW (1988) J Chem Phys 89: 1234
Böttcher CJF, Bordewijk P (1978) Theory of electric polarization, Vol II, Elsevier, New York, Chap 11
Williams G (1979) Chem Soc Rev 7: 89
Williams G, Watts DC (1977) Trans Faraday Soc 66: 80
Ivanov EN (1963) Zh Eksp Teor Fiz 45: 1509 [Sov Phys JETP (1964) 18: 1041]
Roberts PH, Ursell DD (1960) Proc Roy Soc London A252: 317
Cukier RI, Lakatos-Lindenberg K (1972) J Chem Phys 57: 3427
Cukier RI (1974) J Chem Phys 60: 734
Anderson JE, Ullman R (1967) J Chem Phys 47: 2178
Silescu H (1971) J Chem Phys 54: 2110
Kovacs AJ, Aklonis JJ, Hutchinson JM, Ramos AR (1979) J Polymer Sci, Polymer Phys Ed 17: 1097
Provencher SW (1982) Comp Phys Comm 27: 213
Lindsey CP, Patterson GD (1980) J Chem Phys 73: 3348
Weber TA, Helfand E (1983) J Phys Chem 87: 2881
Bahar I, Erman B (1988) J Chem Phys 88: 1228
Bahar I, Erman B (1987) Macromolecules 20: 1368
Doi M, Edwards F (1986) The theory of polymer dynamics. Clarendon, Oxford
Wang CC, Pecora R (1980) J Chem Phys 72: 5333
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© 1994 Springer-Verlag
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Roe, RJ. (1994). MD simulation study of glass transition and short time dynamics in polymer liquids. In: Monnerie, L., Suter, U.W. (eds) Atomistic Modeling of Physical Properties. Advances in Polymer Science, vol 116. Springer, Berlin, Heidelberg . https://doi.org/10.1007/BFb0080198
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DOI: https://doi.org/10.1007/BFb0080198
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