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Influence of branching on the properties of poly(ethylene terephthalate) fibers
Author(s) -
Hess C.,
Hirt P.,
Oppermann W.
Publication year - 1999
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/(sici)1097-4628(19991017)74:3<728::aid-app27>3.0.co;2-x
Subject(s) - branching (polymer chemistry) , crystallinity , materials science , polymer , spinning , condensation polymer , molar mass , polymer chemistry , melt spinning , intrinsic viscosity , synthetic fiber , ethylene , polyethylene terephthalate , composite material , polymer science , fiber , chemistry , organic chemistry , catalysis
A series of branched poly(ethylene terephthalate) samples was prepared by employing 0.07–0.42 mol % trimethylolpropane (TMP) for melt polycondensation. These polymers were characterized with respect to molar mass, intrinsic viscosity, and melt viscosity. Spinning into fibers took place at spinning speeds ranging from 2500 to 4500 m/min. The molecular orientation of the fibers as measured by birefringence and polarized fluorescence decreases with growing amounts of TMP, as does crystallinity. Thus with slightly branched polymers, higher spinning speeds than with a linear polymer can be used to achieve a certain property profile. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 728–734, 1999