The effect of orientation on the rotational and translational diffusion of a spin probe in polypropylene
| Autor: | A.M. Vasserman, I.I. Barashkova, N.Ya. Rapoport |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
Polypropylene
chemistry.chemical_classification Materials science Recrystallization (geology) Isotropy General Engineering Polymer Molecular physics Quantitative Biology::Cell Behavior Amorphous solid Spin probe chemistry.chemical_compound Nuclear magnetic resonance chemistry Orientation (geometry) Diffusion (business) |
| Zdroj: | Polymer Science U.S.S.R.. 21:1851-1857 |
| ISSN: | 0032-3950 |
| DOI: | 10.1016/0032-3950(79)90091-1 |
| Popis: | The rotational and translational diffusion of a spin probe in isotropic and orientated polypropylene is investigated. It is shown that when a free radical probe is introduced into the polymer after it has been stretched, the main factors affecting its translational diffusion are geometrical hindrances which increase in the course of orientation. On the other hand, when the radical is introduced before stretching, both geometric hindrances and the mobility of amorphous regions in which it finds itself on recrystallization exert an effect. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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