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Binding studies of sodium dodecyl benzene sulphonate with poly(N-vinyl-2-pyrrolidone) (1992)

Anand, K. ; Yadav, O. P. ; Singh, P. P.

Springer

Colloid & polymer science 270 (1992), S. 1201-1207

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ISSN: 1435-1536

Keywords: Micellization ; ultrasound velocity ; hydrophobic ; co-operative ; conformational

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract The binding of sodium dodecyl benzene sulphonate (SDBS) with poly(N-vinyl-2-pyrrolidone) (PVP) has been investigated at 303.15 and 313.15 K using equilibrium dialysis, surface tension, viscosity, ultrasound velocity and ultrasound absorption techniques. From each of these studies four distinct regions of SDBS-PVP interactions were observed. Interaction of SDBS with PVP was found to involve the binding of surfactant dimers with the polymer molecule followed by usual micellization. The binding data has been analyzed in terms of various models of polymer-surfactant interaction.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01095061

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TSDC studies on thermoelectrets of CR-39(DOP) (1990)

Singh, A. ; Singh, P. ; Singh, V. P. ; [et al.]

Weinheim : Wiley-Blackwell

Acta Polymerica 41 (1990), S. 48-51

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ISSN: 0323-7648

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Description / Table of Contents: Aus dem Polymer CR-39(DOP) wurden Thermoelektrete formiert, und die thermisch stimulierten Entladungsströme wurden gemessen. Die Einflüsse unterschiedlicher Formierungstemperaturen, unterschiedlicher Feldstärken und der Lagerzeit wurden untersucht, um das Elektretverhalten dieses Materials zu beschreiben. Die Polarisation ist dipolaren Ursprungs. Die Aktivierungsenergic und die Relaxationszeit wurden berechnet.

Notes: Thermoelectrets of CR-39(DOP) were formed and their thermally stimulated discharge current studied. In the present work, effects of different forming temperatures, polarizing fields and storage times have been studies with a view to understand the electret behaviour of this material. The polarization seems to have a dipolar origin. The activation energy and relaxation times have also been calculated.

Additional Material: 4 Ill.