DYNAMICS OF POLYMERS AT INTERFACES

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This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project addresses fundamental questions concerning the behavior of polymers at interfaces: (1) What processes control the formation of an adsorbed layer on a clean surface? (2) What processes control the displacement of preadsorbed polymers? (3) Can one accurately predict the structure of polymer layers? To answer these questions, using neutron reflectivity, we have studied adsorbed layers of the polymer poly(methyl methacrylate) (PMMA) onto a quartz substrate. The polymer density profiles were derived from the neutron reflectivity data. We ... continued below

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51 Kilobytes pages

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SMITH, G.S.; MAJEWSKI, J. & AL, ET November 1, 1999.

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Description

This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project addresses fundamental questions concerning the behavior of polymers at interfaces: (1) What processes control the formation of an adsorbed layer on a clean surface? (2) What processes control the displacement of preadsorbed polymers? (3) Can one accurately predict the structure of polymer layers? To answer these questions, using neutron reflectivity, we have studied adsorbed layers of the polymer poly(methyl methacrylate) (PMMA) onto a quartz substrate. The polymer density profiles were derived from the neutron reflectivity data. We have shown that dry films exhibit behavior predicted by mean-field theory in that the equilibrated layer thickness scales with the molecular weight of the polymer. Also, we find that the profiles of the polymers in solution qualitatively agree with those predicted by reflected random walk (RRW) theories, yet the profiles are not in quantitative agreement.

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51 Kilobytes pages

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  • Other Information: PBD: 1 Nov 1999

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  • Report No.: LA-UR-99-2853
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/785036 | External Link
  • Office of Scientific & Technical Information Report Number: 785036
  • Archival Resource Key: ark:/67531/metadc723565

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • November 1, 1999

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 24, 2016, 8:35 p.m.

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SMITH, G.S.; MAJEWSKI, J. & AL, ET. DYNAMICS OF POLYMERS AT INTERFACES, report, November 1, 1999; New Mexico. (digital.library.unt.edu/ark:/67531/metadc723565/: accessed January 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.