Conformation of polymer molecules at solid liquid interfaces by small-angle neutron scattering
- Univ. of Pennsylvania, PA (United States)
A wide variety of physical-chemical phenomena depend on the behavior of polymer at solid-liquid interfaces. The feature that distinguishes such phenomena from their small-molecule counterparts is the long-chain structure of the polymer molecules. Just as in solution and the bulk, the conformational statistics of the polymer molecules in the interface is an important determinant of interfacial properties. Conformational statistics of interfacial polymer is expressed in terms a function called the polymer density profile {phi}(Z), which is just the volume fraction of polymer as a function of Z, the distance from the solid surface out into the continuous liquid. The systems studied in these experiments were samples of narrow molecular weight distribution poly(n-butyl methacrylate) with molecular weights of 45000 and 7000 g/mol that were chemically bonded (grafted) by one chain-end to nearly monodisperse, 2300 {angstrom} SiO{sub 2} spheres. Dispersions, both of bare spheres and spheres with grafted polymer, were examined by small angle neutron scattering. Experiments were done in mixtures of hydrogeneous and deuterated isopropyl alcohol -- (HIPA and DIPA respectively), dispersions were prepared with 100, 80, 60, 40, 20 and 0.0% DIPA.
- OSTI ID:
- 182234
- Report Number(s):
- CONF-950140-; TRN: 95:008516-0008
- Resource Relation:
- Conference: 3. international conference on polymer characterization, Denton, TX (United States), 11-15 Jan 1995; Other Information: PBD: 1995; Related Information: Is Part Of Third international conference on polymer characterization; PB: 109 p.
- Country of Publication:
- United States
- Language:
- English
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