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Effective cross‐sections for molecular aggregation in external orienting fields
Author(s) -
Ziabicki Andrzej,
Jarecki Leszek
Publication year - 1995
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/masy.19950900105
Subject(s) - nucleation , crystallization , quadrupole , dipole , anisotropy , materials science , chemical physics , condensed matter physics , magnetic field , thermodynamics , chemistry , physics , optics , atomic physics , organic chemistry , quantum mechanics
Effects of an external orienting field and orientational cross‐section for molecular association on the kinetics of crystal nucleation and critical temperature of crystallization is discussed. Dipole and quadrupole effects of an electric (magnetic) field and quadrupole effects of hydrodynamic potential of uniaxial flow are considered. Critical temperature of crystallization, free energy barrier of nucleation and nucleation rates are orientation‐dependent. Smaller orientational cross‐sections result in stronger anisotropy of the nucleation rates.