| Autor: | G. Mennig, K. Engelsing |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Materials science Mechanical Engineering General Chemical Engineering Aerospace Engineering Polymer Styrene Amorphous solid chemistry.chemical_compound Creep chemistry Volume (thermodynamics) Copolymer General Materials Science Deformation (engineering) Composite material Acrylonitrile |
| Zdroj: | Mechanics of Time-Dependent Materials. 5:27-38 |
| ISSN: | 1385-2000 |
| DOI: | 10.1023/a:1009858702188 |
| Popis: | Measurements on the creep behavior of injection moldedstyrene-acrylonitrile copolymer (SAN) samples are described andanalyzed. It is shown that the processing conditions have a distincteffect on the tendency to creep and that the differences in creepbehavior are mainly due to differences in frozen-in free volume, whereasthe different state of molecular orientation and internal stress haveonly a neglegible effect on the creep behavior. In addition, the timebetween processing and testing of the material plays an important rolefor the deformation behavior of the amorphous polymer; this phenomenonis known as physical aging. A slower cooling rate during thesolidification of the injection molded part, as well as a longer agingtime, lead to a reduced free volume and therefore to a reduced tendencyto creep. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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