Poly(styrene-b-2-vinylpyridine-1-oxide) diblock copolymers: 3. Microemulsions in water/propan-2-ol/toluene mixtures

Biggs S. and Vincent B. (1992) Poly(styrene-b-2-vinylpyridine-1-oxide) diblock copolymers: 3. Microemulsions in water/propan-2-ol/toluene mixtures. Colloid & Polymer Science, 270 6: 563-573. doi:10.1007/BF00658287


Author Biggs S.
Vincent B.
Title Poly(styrene-b-2-vinylpyridine-1-oxide) diblock copolymers: 3. Microemulsions in water/propan-2-ol/toluene mixtures
Journal name Colloid & Polymer Science   Check publisher's open access policy
ISSN 0303-402X
Publication date 1992-01-01
Year available 1992
Sub-type Article (original research)
DOI 10.1007/BF00658287
Open Access Status
Volume 270
Issue 6
Start page 563
End page 573
Total pages 11
Publisher Steinkopff-Verlag
Language eng
Subject 1505 Marketing
1606 Political Science
2505 Materials Chemistry
2507 Polymers and Plastics
Abstract Pseudo-ternary phase diagrams have been constructed for the three-component solvent system (toluene+water+propan-2-ol) containing diblock copolymers of poly(styrene-b-2-vinylpyridine-1-oxide). Microemulsions have been shown to form on the water-rich side of the phase diagram, in the region of the phase boundary without polymer. Dynamic light-scattering experiments have led to droplet size values in the region of 100 nm, with the size depending strongly on the propan-2-ol/water concentration, as well as the amount of solubilised toluene in the core. Viscometry experiments have been carried out to measure polymer aggregation numbers in the microemulsion droplets, and interfacial tension measurements have shown that in the absence of propan-2-ol (effectively a cosurfactant) the limiting value of the oil/water interfacial tension, even an saturation adsorption of the copolymer is ∼ 20 mNm-1. However, addition of propan-2-ol reduces the interfacial tension to the very low values generall commensurate with microemulsion formation.
Keyword Diblock copolymers
polystyrene-b-poly(vinylpyridine-1-oxide)
ternary solvent microemulsions
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
 
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