Water-soluble and amphiphilic polymers
| ISSN: |
1436-2449
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Chemistry and Pharmacology
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Physics
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| Notes: |
Summary Thin filns of PSt/PMAA and PEO-PSt-PEO block polyners were deposited on a polystyrene substrate by solution adsorption (with or without solvent treatnent), and the filn surfaces were characterized by neans of XPS. Direct solvent-casting of PEO-PSt-PEO from benzene solutions resulted in PSt-rich surfaces, whereas PMAA richer surfaces were obtained for PSt/PMAA filns cast from DMF solutions. Moreover, solvent treatment after casting had profound effect on the filn surface conposition. Treatment with water markedly increased the surface concentration of polar PEO segments. In the case of PSt-PMAA block polymers, the PSt content on the surface increased in the order of water〈 ethanol 〈 cyclohexane 〈 petroleum ether, the last-named giving films with almost pure PSt surface. It is well worth noticing that the bulk conposition had little to do with the surface conposition for both PSt/PMAA and PEO-PSt-PEO block polyners within the conposition range investigated when subsequent solvent treatnent was applied.
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| Type of Medium: |
Electronic Resource
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| URL: |