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An optical investigation of high‐tenacity polyester (H‐T PET) fibers annealed at different temperatures
Author(s) -
ElDessouky H.M.,
Mahmoudi M.R.,
Yassien K.M.,
Lawrence C.A.
Publication year - 2008
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21184
Subject(s) - materials science , crystallinity , tenacity (mineralogy) , composite material , annealing (glass) , polyester , birefringence , synthetic fiber , optical microscope , shrinkage , fiber , optics , scanning electron microscope , physics
A two‐beam “Interphako” interference microscope was used to study the effect of annealing on the physical properties of high‐tenacity poly(ethylene terephthalate) H‐T PET fibers. The PET fibers were annealed with free ends for 1 h at temperatures ranging from 100 to 200°C. The shrinkage, refractive indices, and orientation angle of the PET fibers were determined for different annealing temperatures. The measured birefringence and orientation function were found to have decreased with increasing temperature, whereas the degree of crystallinity and the onset temperature (DSC) increased. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers