Density changes in very thin films of DPMMA as seen by neutron critical reflection
We present some preliminary evidence on the variation of polymer density with film thickness. Our studies are still at an early stage but nevertheless our results point out strongly the necessity of considering interfacial effects when thin films are involved. We studied the influence of annealing o...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
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Publ by ACS
1989
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| _version_ | 1797065304127307776 |
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| author | Fernandez, M Higgins, J Penfold, J Ward, R Shackleton, C Walsh, D |
| author_facet | Fernandez, M Higgins, J Penfold, J Ward, R Shackleton, C Walsh, D |
| author_sort | Fernandez, M |
| collection | OXFORD |
| description | We present some preliminary evidence on the variation of polymer density with film thickness. Our studies are still at an early stage but nevertheless our results point out strongly the necessity of considering interfacial effects when thin films are involved. We studied the influence of annealing on the structure of two-layers approximately 1000 angstrom thick of dPMMA, one of high and one of low molecular weight. From the results it seems that the molecular weights of the dPMMA do not influence greatly the scattering length densities of the polymer. However, the film thickness plays a major role in the resulting magnitude of the density. |
| first_indexed | 2024-03-06T21:26:44Z |
| format | Journal article |
| id | oxford-uuid:435ad613-193e-4c67-b63a-f5b0b5dc7804 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:26:44Z |
| publishDate | 1989 |
| publisher | Publ by ACS |
| record_format | dspace |
| spelling | oxford-uuid:435ad613-193e-4c67-b63a-f5b0b5dc78042022-03-26T14:54:47ZDensity changes in very thin films of DPMMA as seen by neutron critical reflectionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:435ad613-193e-4c67-b63a-f5b0b5dc7804EnglishSymplectic Elements at OxfordPubl by ACS1989Fernandez, MHiggins, JPenfold, JWard, RShackleton, CWalsh, DWe present some preliminary evidence on the variation of polymer density with film thickness. Our studies are still at an early stage but nevertheless our results point out strongly the necessity of considering interfacial effects when thin films are involved. We studied the influence of annealing on the structure of two-layers approximately 1000 angstrom thick of dPMMA, one of high and one of low molecular weight. From the results it seems that the molecular weights of the dPMMA do not influence greatly the scattering length densities of the polymer. However, the film thickness plays a major role in the resulting magnitude of the density. |
| spellingShingle | Fernandez, M Higgins, J Penfold, J Ward, R Shackleton, C Walsh, D Density changes in very thin films of DPMMA as seen by neutron critical reflection |
| title | Density changes in very thin films of DPMMA as seen by neutron critical reflection |
| title_full | Density changes in very thin films of DPMMA as seen by neutron critical reflection |
| title_fullStr | Density changes in very thin films of DPMMA as seen by neutron critical reflection |
| title_full_unstemmed | Density changes in very thin films of DPMMA as seen by neutron critical reflection |
| title_short | Density changes in very thin films of DPMMA as seen by neutron critical reflection |
| title_sort | density changes in very thin films of dpmma as seen by neutron critical reflection |
| work_keys_str_mv | AT fernandezm densitychangesinverythinfilmsofdpmmaasseenbyneutroncriticalreflection AT higginsj densitychangesinverythinfilmsofdpmmaasseenbyneutroncriticalreflection AT penfoldj densitychangesinverythinfilmsofdpmmaasseenbyneutroncriticalreflection AT wardr densitychangesinverythinfilmsofdpmmaasseenbyneutroncriticalreflection AT shackletonc densitychangesinverythinfilmsofdpmmaasseenbyneutroncriticalreflection AT walshd densitychangesinverythinfilmsofdpmmaasseenbyneutroncriticalreflection |