The influence of acid dyes upon some structural and physico-mechanical indices of polyamide fibres

• Autorzy: Nedkova M. , Pavlov P. , Pishev D.
• Języki publikacji: EN

Abstrakty

EN

The influence of three acid dyes upon some physico-mechanical indices of polyamide multifilament yarn has been studied as a consequence of the structure modifications which occur during the dyeing process. It has been established that, irrespective of the differences in the chemical composition of the dyes, the modifications in the properties of the samples used are quite similar. Some structural characteristics, tenacity and elongation at break, crease resistance and the critical time of dissolution, have been determined. The dependencies of the indices listed on the dye concentration are of a complex character, which reflects the gradual penetration of the dye molecules into the inter-fibrillar and intra-fibrillar amorphous areas of the structure which are different in solidity. The fluctuations in the course of the dependencies in the area of the lowest concentrations are the result of the combined influence of the processes of improvement of the crystal phase and the relaxation phenomena, occurring in the most accessible amorphous areas of the fibrous structure. With the increase in the dye concentration, the so-called 'cross-linking effect' starts to appear, as a result of the formation of inter-molecular links of the polymer-dye-polymer type, which influence the properties under investigation in a characteristic way. The increase in the dye presence in the substrate provokes the repeated alternation of the above-mentioned phenomena in the thicker amorphous areas of the samples, with a pronounced influence of the 'cross-linking effect' in the highest concentrations.

Słowa kluczowe

EN

polyamide; multifilament yarn; dyeing; acid dyes; modification; supra-molecular structure; relationship; physico-mechanical indices

PL

poliamid; przędza wielowłókienkowa; farbowanie; barwniki kwasowe; modyfikacja; relacje; wskaźniki fizyko-mechaniczne

• Wydawca: Lodz University of Technology, Faculty of Material Technologies and Textile Design
• Czasopismo: Autex Research Journal
• Rocznik: 2005
• Tom: Vol. 5, no. 3
• Strony: 162--175
• Opis fizyczny: Bibliogr. 32 poz.

Twórcy

autor

Nedkova M.

• University of Chemical Technology and Metallurgy Textile and Leather Department Kliment Ohridski 8 Sofia 1756, Bulgaria, Tel. [phone]

autor

Pavlov P.

• University of Chemical Technology and Metallurgy Textile and Leather Department Kliment Ohridski 8 Sofia 1756, Bulgaria, Tel. [phone]

autor

Pishev D.

• University of Chemical Technology and Metallurgy Textile and Leather Department Kliment Ohridski 8 Sofia 1756, Bulgaria, Tel. [phone]

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