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The influence of structural and morphological changes on the electrokinetic properties of PA 6 fibresStana-Kleinschek, Karin ; Strnad, Simona, 1965- ; Ribitsch, VolkerA two-phase model composed of alternating crystalline and amphorous regions is usually used to describe the structure of fibre-forming polymers. Different changes in fibre fine structure influence ... the entire morphological character of the polymer. The ratio between the fibres crystalline and amprphous area (accessible part of the polymer) defines their adsorption character. In the present paper, we tried to analyse the interdependence between fibre structure and their electrokinetic character. The structure and the adsorption abilities of PA 6 fibres were modified by thermal treatment. The accessibility of free adsorption places in the amorpohous part of PA 6 polymers was investigated by the determination of electrokinetic properties, which were analysed by ▫$\zeta$▫ potential determination. It was determined by streaming-potential measurements as a function of the pH and the surfactant concentration in the liquid phase. From the ▫$\zeta$▫ - pH functions the adsorption potential for all ionic species ▫$\phi_i$▫ (i.e. ▫$\phi_K_+$▫, ▫$\phi_H_+▫$, ▫$\phi_Cl_-$▫, ▫$\phi_OH_-$▫, in the case of potassium chloride solutions), the charge densities ▫$\sigma^k$▫ and pK values were calculated according to the Börner and Jacobasch model. From the ▫$\zeta$▫-surfactant concentration functions the adsorption isotherms were calculated. The results show that the modifications to the polymer structure cause different electrokinetic properties that correlate with the changes in the fine structure and morphology. After thermal treatments the crystallinity of the samples increases, which causes the increase in negativity of ZP plateau (pH=9).Source: Colloids and surfaces. A, Physicochemical and Engineering Aspects. - ISSN 0927-7757 (159, 1999, str. 321-330)Type of material - article, component partPublish date - 1999Language - englishCOBISS.SI-ID - 5027094
Author
Stana-Kleinschek, Karin |
Strnad, Simona, 1965- |
Ribitsch, Volker
Topics
tekstilna industrija |
PA 6 vlakna |
vlaknotvorni polimeri |
struktura |
morfologija |
adsorpcija |
elektrokinetične lastnosti |
textile industry |
PA 6 fibres |
fibre forming polymers |
structure |
morphology |
adsorption |
electrokinetic properties
source: Colloids and surfaces. A, Physicochemical and Engineering Aspects. - ISSN 0927-7757 (159, 1999, str. 321-330)
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Stana-Kleinschek, Karin | 07814 |
Strnad, Simona, 1965- | 10575 |
Ribitsch, Volker | 15077 |
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