Dilution Wave and Negative-Order Crystallization Kinetics of Chain Molecules Academic Article uri icon

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abstract

  • We show that the crystal growth rate of a very long-chain n-alkane C C(198)H(398) from solution can decrease with increasing supersaturation and follow strongly negative order kinetics. The experimental behavior can be well represented by a theoretical model which allows the molecule to attach and detach as either extended or folded in two. The obstruction of extended-chain growth by unstable folded depositions increases disproportionately with increasing concentration. As a consequence of this abnormal kinetics, a "dilution wave" can propagate and trigger a folded-to-extended-chain transformation on its way.

authors

  • Ungar, G
  • Mandal, PK
  • Higgs, Paul
  • de Silva, DSM
  • Boda, E
  • Chen, CM

publication date

  • November 13, 2000