Adsorption of photoactive amphiphilic polymers onto hydrophobic polymer films. Polystyrene-block-poly(2-vinylnaphthalene)-block-poly(methacrylic acid)
- Univ. of Texas, Austin, TX (United States)
Diblock polystyrene-block-poly(methacrylic acid) polymers have been synthesized using anionic polymerization techniques incorporating an average of one naphthalene per polymer at either the beginning of the polystyrene block or at the junction between the polystyrene and poly(methacrylic acid) blocks. These polymers have been shown in earlier work to form stable micelles in solvent mixtures from 80:20 dioxane/H[sub 2]O to pure water. In the present paper we have examined the ability of these polymers to adsorb on polystyrene films and have used photophysical techniques to deduce the exposure of the naphthalene group to the aqueous phase. Scanning electron microscopy images demonstrate that the intact micelle adsorbs onto the polystyrene surface and can achieve a nearly close-packed monolayer coverage. The micelles adhere tenaciously to the polystyrene film and lower the contact angle of water from ca. 90[degree] for untreated polystyrene to 30-40[degree] after surface adsorption. The naphthalene groups at the polystyrene-poly(methacrylic acid) junction are partially exposed to the aqueous phase while the naphthalene at the poly(styrene) end is totally protected. 21 refs., 6 figs., 5 tabs.
- DOE Contract Number:
- FG03-93ER14337
- OSTI ID:
- 6980684
- Journal Information:
- Langmuir; (United States), Vol. 10:6; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COPOLYMERS
ADSORPTION
SYNTHESIS
FLUORESCENCE
QUENCHING
MICELLAR SYSTEMS
COMPILED DATA
DIOXANE
FILMS
POLYMERIZATION
POLYSTYRENE
SCANNING ELECTRON MICROSCOPY
WATER
CHEMICAL REACTIONS
DATA
ELECTRON MICROSCOPY
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
LUMINESCENCE
MATERIALS
MICROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYVINYLS
SORPTION
SYNTHETIC MATERIALS
400201* - Chemical & Physicochemical Properties
400500 - Photochemistry