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- Title
Fibre-grade copoly(oxyethylene-b-ethylene terephthalate)s with improved optical properties.
- Authors
Ukielski, Ryszard; Kondratowicz, Filip Łukasz
- Abstract
The conditions of synthesis of block copoly(oxyethylene-b-ethylene terephthalate)s (PEG-b-PET) with good optical parameters and designed for the production of hydrophilic fibers are presented. For polycondensation the catalysts: antimony trioxide (Sb2O3) and titanium tetraisopropoxide [Ti(OiPr)4] were used. The best optical properties of the polymers were achieved by using the mixture of Sb2O3/Ti(OiPr)4 catalysts. The system which thermally stabilize the PEG-b-PET copolymers was selected. It was stated that the melting temperature (Tm) of the copolymer was insignificantly lower than that of the PET homopolymer (ΔT = 11 K) when the content of PEG 4000 comonomer amounts 30 wt. %. When the weight fraction of PEG 4000 in the copolymer dśs not exceed 20 wt. % a cold crystallization is observed.
- Subjects
COPOLYMERS; POLYETHYLENE terephthalate; OPTICAL fibers; CATALYSTS; ANTIMONY compounds; TITANIUM compounds; OPTICAL properties; POLYESTER fibers
- Publication
Polimery, 2008, Vol 53, Issue 3, p224
- ISSN
0032-2725
- Publication type
Article
- DOI
10.14314/polimery.2008.224