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Chemical etching of poly(ethylene terephthalate) filaments
Author(s) -
Chauhan R. S.,
Rao M. V. S.,
Dweltz N. E.
Publication year - 1985
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.1985.070300102
Subject(s) - materials science , composite material , isotropic etching , ethylene , crystallization , etching (microfabrication) , stress (linguistics) , fabrication , monomer , aqueous solution , thermal , polymer chemistry , chemical engineering , polymer , layer (electronics) , chemistry , organic chemistry , thermodynamics , medicine , linguistics , philosophy , alternative medicine , pathology , physics , engineering , catalysis
Abstract Chemical etching of poly(ethylene terephthalate) filaments with aqueous methylamine has revealed a complex stress—cracking behavior, which varied with orientation and thermal crystallization conditions. The appearance of both longitudinal and transverse cracks, can be explained on the basis of the existence of two types of domains, where the stresses are preferentially concentrated. They are explained on the basis of Prevorsek's structural model. In heat‐set fibers, there exists a skin to core differentiation in the internal stress distribution. The crack pattern also varied depending on whether the fibers were heat‐set in the taut or slack conditions. This chemical etching technique can prove to be a very useful tool, for the study of the internal stress distribution induced in fibers by various fabrication processes or post mechanical deformations.