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Details for article 9 of 12 found articles
| Title: |
Poly (Ethylene Terephthalate) Films with Different Content of Acid-Base Functionalities. II. Gas Phase Analysis and Proposed Mechanisms |
| Author: |
Gheorghiu, Mariana Pascu, Mihaela Vasile, Cornelia Popa, G. |
| Appeared in: |
International journal of polymeric materials |
| Paging: | Volume 40 (1998) nr. 3-4 pages 257-275 |
| Year: |
1998-06-01 |
| Contents: |
The data about the plasma gas phase analysis and also a contribution to the mechanisms involved in such modifications are presented in this second part. Main 16 neutral species and their evolution in time, with and without PET sample in the treatment system, were investigated by MS. The fluences of atomic and molecular oxygen ions at the polymer surface were determined. A decreased content in neutral species higher is the ion energy is stood out when the PET sample is inside the treatment system. Appreciable differences between the treatments made in saturation regime and those in reimplantation regime were stood out. An enhanced etching mechanism is active in the treatments with ions of 100 and 300 eV, at the lowest dose, while an etching mechanism in stationary regime in a competition with a cross-linking process are important for the treatment with of 500 eV, the same dose. Treatments at this dose do not confer a prevalent acidic or basic character of the PET surface. A diminished etching process and an ion beam induced crystallisation are the main processes for treatments in a reimplantation regime. A more prevalent acidic or basic character of the treated PET surfaces is stood out. The ageing effects were explained by the surface oxygen content, the predominance of short or long range motion and the HSAB reactions. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 9 of 12 found articles
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