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Influence of branching on the properties of poly(ethylene terephthalate) fibers

✍ Scribed by C. Hess; P. Hirt; W. Oppermann

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 149 KB
Volume: 74
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19991017)74:3<728::aid-app27>3.0.co;2-x

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✦ Synopsis

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.

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