THE DYEABILITY AND PROPERTIES OF STRUCTURALLY MODIFIED POLYETHYLENE TEREPHTHALATE FIBRES

No Thumbnail Available
Date
1979-02
Authors
EKPENYON, OROK EKPO
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The effect of solvent - treatment on the dyeability and mechanical properties of polyethylene terephthalate (PET) has been studied. The mechanical properties of the dyed PET fibres and some heat-set PET samples are also given. It was observed that strongly interacting solvents such as N,N-dimethyl formamide (DMF) and acetonitrile (CH.CN) improved the dyeability of PET which had been treated with these solvents at 74 0 C for 15 minutes prior to dyeing with disperse dyes at 100 C. The relative dye-uptake after DMF-treatment is 20 times greater than after acetonitrile treatment. Pretreatment in both solvents resulted in a lowering of tensile strength. Dyeing caused a decrease in tensile strength, extensibility and initial modulus at saturation but these properties improved when that initial saturation interval was exceeded. Solvent - treatment and heat-setting led to improvement in the crystallinity of the PET fibres. Although the densities of the various - treated PET fibres cannot be entirely relied upon due to errors caused by the use of the carbon tetrachloride - n-heptane mixture in the gradient column, the trends suggest that density increases with increase in heat-setting temperature
Description
A Thesis submitted to the Ahmadu Bello University, Zaria in partial fulfilment of the requirements for the award of the degree of MASTER OF SCIENCE IN POLYMER SCIENCE AND TECHNOLOGY. Department of Chemistry, FEBRUARY, 1979 Ahmadu Bello University, Zaria, Nigeria.
Keywords
DYEABILITY,, STRUCTURALLY,, MODIFIED,, POLYETHYLENE,, TEREPHTHALATE,, FIBRES
Citation
Collections