Wetting properties of thin liquid polyethylene propylene films

Journal Article · Mon Mar 08 00:00:00 EST 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.1453· OSTI ID:6736505

Zhao, W; Rafailovich, M H; Sokolov, J ^[1]; Fetters, L J; Plano, R; Sanyal, M K; Sinha, S K ^[2]; Sauer, B B ^[3]

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1. Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)
2. Exxon Research and Engineering Company, Annandale, New Jersey 08801 (United States)
3. E. I. Du Pont de Nemours and Company, Inc., Experimental Station, Wilmington, Delaware 19880 (United States)

Polyethylene propylene films of various molecular weights, which would normally wet native-oxide-covered Si surfaces, were observed to dewet the surface when the film thickness became less than the polymer radius of gyration. These films could be made to wet either by increasing the annealing temperature or by chemically modifying the surface. The results are shown to be consistent with an expression for the spreading parameter that incorporates a stretching free energy term for the polymer chains. Measurements of the diffusion constant of the polymer on the silica surface indicated that an activation energy was required to desorb the polymer segments from the surface before diffusion could occur.

• DOE Contract Number: FG02-90ER45437
• OSTI ID: 6736505
• Journal Information: Physical Review Letters; (United States), Vol. 70:10; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
POLYETHYLENES
WETTABILITY
POLYPROPYLENE
ANNEALING
SILICON OXIDES
SURFACE ENERGY
SURFACE PROPERTIES
SURFACE TENSION
TEMPERATURE EFFECTS
THICKNESS
THIN FILMS
CHALCOGENIDES
DIMENSIONS
ENERGY
FILMS
FREE ENERGY
HEAT TREATMENTS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERS
POLYOLEFINS
SILICON COMPOUNDS
THERMODYNAMIC PROPERTIES
360606* - Other Materials- Physical Properties- (1992-)