Rigid Polyurethane Foams Combined With Dendritic Polypyrrole as Antistatic Materials
Bibliographic record
Abstract
ABSTRACT Two‐component rigid polyurethane (PU) foams, which are non‐reactive to acid amine drainage, are broadly used in mining applications to fill or prevent subsidence areas, support tunnel roofs, and control ventilation structures. However, its highly insulating nature always poses challenges in preventing the buildup of static charge, which remains a critical concern in industrial and safety contexts. In this study, dendritic conducting polypyrrole (PPy) was incorporated into PU foams to establish a conductive pathway. The results showed that a percolation threshold of 3.5%–5% is necessary to achieve a resistivity of 10 6 –10 7 Ω/cm. The PPy particles were first characterized via SEM, TEM, TGA, and FTIR. Then, the quasi‐static and dynamic compression properties and electrical impedance spectroscopy of the resulting foams were carefully investigated via Bode, Nyquist, and impedance phase plots as a function of frequency. It was shown that the PPy particles established a conductive pathway in the PU matrix, leading to a stable electrical tunneling effect. A stable impedance value of 10 6 –10 7 Ω was found to decrease above 10 4 Hz, where the nanocomposite behavior changed from resistive‐like (frequency‐independent) to capacitive‐like (frequency‐dependent).
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".