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The effect of short heat treatment on different properties of PET fiber using double beam interference microscopy
Author(s) -
Sokkar T. Z. N.,
ElFarhaty K. A.,
ElBakary M. A.,
Ali A. M.,
Ahmed A. A.
Publication year - 2018
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22977
Subject(s) - crystallinity , shrinkage , annealing (glass) , materials science , optical microscope , composite material , microscopy , ethylene , microscope , optics , chemistry , scanning electron microscope , biochemistry , physics , catalysis
Pluta microscope used to throw light on the effect of heat treatment time on the different properties of poly (ethylene terephthalate) PET fibers. PET fibers were annealed at times ranged from 5 to 30 min at different temperatures (150, 170, 190, 210°C) using two different processes (fast cooling and slow cooling processes) in air. The refractive indices, the shrinkage, orientation factor and crystallinity of PET fibers were determined for different annealing temperature during the short time treatment. The shrinkage percentage and degree of crystallinity increased with increasing the temperature and time of annealing. Microinterferograms are given for illustration.