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Studies on orientation phenomena by fiber formation from polymer melts. Part II. Theoretical considerations
Author(s) -
Ziabicki Andrzej
Publication year - 1959
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1959.070020404
Subject(s) - spinning , macromolecule , polymer , orientation (vector space) , materials science , fiber , chemical physics , polymer science , field (mathematics) , mechanics , thermodynamics , polymer chemistry , composite material , chemistry , physics , geometry , mathematics , pure mathematics , biochemistry
The mechanism for orientation of macromolecules through the melt‐spinning of synthetic fibers is analogous to that in polymer solutions flowing in capillaries or in a Couette apparatus. The differences between the two processes, with regard to the velocity field, molecular state, and time dependencies, have been discussed and the differential equations derived to describe the orientation of two extreme molecular models. The coefficients of orientation for fibers consisting of rigid particles (model I) and flexible, coiled chains (model II) have been defined. The specific conditions occuring in fiber‐spinning experiments have been shown, as well as the possibility of applying such experiments to the study of the behavior of macromolecules in the molten state.