Investigation of Polyimidesiloxanes for Use as Adhesives by Electron Spectroscopy for Chemical Analysis
| Autor: | Hengzhong Zhuang, Jerold C. Rosenfeld, Joseph A. Gardella, Joseph A. Incavo, Sergio R. Rojstaczer |
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| Rok vydání: | 1997 |
| Předmět: |
Materials science
Polydimethylsiloxane chemistry.chemical_element Substrate (chemistry) Surfaces and Interfaces General Chemistry Adhesion Nitrogen Electron spectroscopy Surfaces Coatings and Films chemistry.chemical_compound chemistry Mechanics of Materials Materials Chemistry Adhesive Composite material Imide Polyimide |
| Zdroj: | The Journal of Adhesion. 63:199-214 |
| ISSN: | 1545-5823 0021-8464 |
| DOI: | 10.1080/00218469708015221 |
| Popis: | Angle-dependent electron spectroscopy for chemical analysis (ESCA) was used to examine the air facing surface (20–100 A thick) composition of polyimidesiloxanes with different processing variations, and of varying polydimethylsiloxane (PDMS) content and block length (number of PDMS repeat unit varies from 1 to 9). Polyimide was clearly detected (due to the nitrogen content) in the 20–100 A surface regions. This shows that a small amount of PDMS and short PDMS segment lengths in polyimidesiloxanes give a surface region with both PDMS and polyimide present. The surface composition, particularly that in the ca. 100 A region, was correlated to the peel strength of polyimidesiloxane melt pressed to a metal substrate. Our results suggest that both PDMS and polyimide are essential components to rendering a needed peel strength. PDMS, having a good diffusive ability, readily reaches the substrate upon being pressed, achieving intimate contact, while imide groups interact with the substrate, presumably th... |
| Databáze: | OpenAIRE |
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