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Fabrication of Large-area Free-standing Ultrathin Polymer Films
Published on: June 3, 2015
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Surface Films on Poly(oxymethylene) Single Crystals.
Summary
A thin film on poly(oxymethylene) crystals slips during deformation, evidenced by displaced gold nanoparticles on a deformable substrate. This suggests adsorbed polymer molecules may form this surface layer.
Area of Science:
- Polymer Science
- Materials Science
- Surface Science
Background:
- Poly(oxymethylene) crystals are studied for their mechanical properties.
- Understanding surface phenomena is crucial for polymer behavior.
Purpose of the Study:
- To investigate the deformation mechanisms of poly(oxymethylene) single crystals.
- To identify the presence and behavior of surface layers during mechanical stress.
Main Methods:
- Single crystals of poly(oxymethylene) were grown from a bromobenzene solution.
- Crystals were deposited on a deformable substrate.
- Crystal surfaces were decorated with gold nanoparticles.
- The composite was subjected to mechanical deformation.
Main Results:
- Gold decoration revealed breaks displaced relative to cracks in the polymer crystals.
- This displacement indicates movement between the gold layer and the polymer surface.
- A thin, discrete, and potentially mobile film exists on the crystal surface.
Conclusions:
- The observed slip suggests a surface film, possibly of adsorbed polymer molecules, exists on poly(oxymethylene) crystals.
- This surface film influences the crystal's deformation behavior.
- Further research could explore the composition and properties of this adsorbed layer.
