Hydrolytic Aging of Wire Enameled with Polyesterimide and Polyamide Imide Used in Electrical Machines
Bibliographic record
Abstract
This paper reports the influence of hydrolytic aging on the rupture voltage of copper wire enameled with polyestermide reinforced by a polyamide imide layer.A large population of samples was put in a climatic chamber regulated at 40℃ and 93% relative humidity.The wet aging was carried out until 15000h.Every time of 500h, 80 samples were taken from the climatic chamber and submitted to AC breakdown test.A statistic investigation of breakdown voltage values was done using Weibull model.Scale parameter, shape parameter and confidence intervals are presented.The breakdown voltage changes in function of aging time.The raise is ascribed to the arrangement in the structure of the polymer.While its lowering is assigned to the diminution in the viscosity causing a raise of mean free path of charge carriers.The shape parameter changes versus aging time.The shortening is due to the increase in the size of defects.Whereas its raise is allotted to the arrangement in the structure.TGA shows a variation of the onset temperature and the residue during the aging.The FTIR tests show a weak modification of the spectra.There is no degradation of the insulation, however a change in molecular conformation occurs.The results are analyzed and discussed.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".