POLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACE
We report the first study of the structure of a monofunctional polymeric surfactant, hydroxyl terminated 1,4-polyisoprene, MW 3200, spread at the air-water interface from hexane solution. The system shows a highly reversible π-A isotherm and remarkable constancy in the film thickness determined by n...
| Автори: | , , , |
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| Формат: | Journal article |
| Опубліковано: |
1993
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| _version_ | 1826291565579993088 |
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| author | Gentle, I Saville, P White, J Penfold, J |
| author_facet | Gentle, I Saville, P White, J Penfold, J |
| author_sort | Gentle, I |
| collection | OXFORD |
| description | We report the first study of the structure of a monofunctional polymeric surfactant, hydroxyl terminated 1,4-polyisoprene, MW 3200, spread at the air-water interface from hexane solution. The system shows a highly reversible π-A isotherm and remarkable constancy in the film thickness determined by neutron reflectivity at surface pressures above and below the classical "collapse transition". The thickness is approximately 30 Å with head group penetration into the water layer of about 10 Å and is consistent with a rigid chain conformation for the polymer. As the film is compressed, it thickens slightly indicating that the tilt of the chains increases from ca. 10° to ca. 15°, but even at relatively low pressures up to 50% of the polymer present does not contribute to the reflectivity and is probably present as multilayers. Ellipsometry measurements indicate that the same film can be transferred to a silicon substrate by Langmuir-Blodgett methods. © 1993 American Chemical Society. |
| first_indexed | 2024-03-07T03:01:18Z |
| format | Journal article |
| id | oxford-uuid:b10d7533-20c6-42fb-b00e-02c71f6c48bb |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:01:18Z |
| publishDate | 1993 |
| record_format | dspace |
| spelling | oxford-uuid:b10d7533-20c6-42fb-b00e-02c71f6c48bb2022-03-27T04:01:03ZPOLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACEJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b10d7533-20c6-42fb-b00e-02c71f6c48bbSymplectic Elements at Oxford1993Gentle, ISaville, PWhite, JPenfold, JWe report the first study of the structure of a monofunctional polymeric surfactant, hydroxyl terminated 1,4-polyisoprene, MW 3200, spread at the air-water interface from hexane solution. The system shows a highly reversible π-A isotherm and remarkable constancy in the film thickness determined by neutron reflectivity at surface pressures above and below the classical "collapse transition". The thickness is approximately 30 Å with head group penetration into the water layer of about 10 Å and is consistent with a rigid chain conformation for the polymer. As the film is compressed, it thickens slightly indicating that the tilt of the chains increases from ca. 10° to ca. 15°, but even at relatively low pressures up to 50% of the polymer present does not contribute to the reflectivity and is probably present as multilayers. Ellipsometry measurements indicate that the same film can be transferred to a silicon substrate by Langmuir-Blodgett methods. © 1993 American Chemical Society. |
| spellingShingle | Gentle, I Saville, P White, J Penfold, J POLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACE |
| title | POLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACE |
| title_full | POLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACE |
| title_fullStr | POLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACE |
| title_full_unstemmed | POLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACE |
| title_short | POLYMER SURFACTANT STRUCTURE AT THE AIR-WATER-INTERFACE |
| title_sort | polymer surfactant structure at the air water interface |
| work_keys_str_mv | AT gentlei polymersurfactantstructureattheairwaterinterface AT savillep polymersurfactantstructureattheairwaterinterface AT whitej polymersurfactantstructureattheairwaterinterface AT penfoldj polymersurfactantstructureattheairwaterinterface |