A study of micelle formation by a polystyrene-poly(ethylene/propylene) block copolymer in a base lubricating oil
β Scribed by C Price; A.L Hudd; R.B Stubbersfield; B Wright
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 302 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0032-3861
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π SIMILAR VOLUMES
The thermodynamics of micelle formation by a polystyrene-b-polyisoprene block copolymer in n-hexadecane, which is a selectively bad solvent for polystyrene, has been investigated. The temperature dependence of the critical micelle concentration (c.m.c.) was determined from measurements of scattering
Abstraet--A calorimetric study was made of micelle formation by a polystyrene-b-polyisoprene block copolymer in n-hexadecane which is a selectively bad solvent for polystyrene. A value of -44.0 + 4.0 kJ mol-~ was obtained for the enthalpy of micellisation, in good agreement with a value of -40.7 +2.
In addition to associating into (''normal'') micelles in aqueous blocks (1). Many of these copolymers associate in aqueous solutions, amphiphilic polyoxyalkylene block copolymers can form solutions to form spherical micelles (with a ''core'' made ''reverse'' micelles in organic solvents at sufficien