Solvation of certain N-based polycationic electrolytes: viscosity measurements in dimethylformamide and dimethylsulfoxide
✍ Scribed by Meenakshi Singh; Anil Kumar; Shirley Easo; B.B. Prasad
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 581 KB
- Volume
- 81
- Category
- Article
- ISSN
- 0167-7322
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✦ Synopsis
Viscosities of four new types of polycationic electrolytes possessing N-alkyl/Nacylammonium and 2,5-thiophenylene linkages in their respective repeating units of the chain (Mol. Wt. 1154-3815) have been studied in the two dipolar aprotic solvents viz., dimethylformamide (DMF) and dimethylsulfoxide (DMSO). The data obtained in DMSO were treated on the basis of Fuoss-Strauss equation. The maximum in reduced viscosity vs concentration profile and the validity of extrapolation procedure to obtain intrinsic viscosity, [11] ((~8~]C)c=o) were discussed on account of solvation mode(s) involved. The concept of critical overlap concentration in collaboration with the derived parameters such as characteristic ratio (C®), maximum cross-dimension (S), root mean square end-to-end distance (<Rg 2"-I~) and plane projection distance (P) was invoked to comprehend polycationic hydrodynamic models in the two solvents of intermediate permittivity at 25 +5°C.