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RESEARCH PRODUCT
Stress relaxation of a polyisobutylene under large strains
Giuseppe TitomanlioG. SpadaroF. P. La Mantiasubject
Materials scienceNuclear magnetic resonanceRheologyStrain (chemistry)Stress relaxationRelaxation (physics)General Materials ScienceMechanicsFunction (mathematics)Deformation (engineering)Extended timeCondensed Matter PhysicsConstant (mathematics)description
Stress relaxation data after single and double elongational strain “steps” were collected on a commercial polyisobutylene, Oppanol B 50. Analogously to other cases a separability of deformation and time effects was observed over an extended time region for the relaxation after single “steps”. Moreover, by comparing the results after double with those after single steps, it was noted that any rheological equation of integral type having a rigorously constant memory function is not able to describe accurately the full body of results presented here. On the other hand the data were favorably compared with the predictions of a model proposed earlier.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1980-07-01 | Rheologica Acta |