Temperature-Dependent Behavior of Langmuir Monolayers of Octadecyl-Substituted Preformed Polyimides
Bibliographic record
Abstract
The behavior of Langmuir monolayers of octadecyl-substituted preformed polyimide molecules exhibits a strong dependence on temperature when the isotherms are measured using a Wilhelmy balance. This suggests a change in structure with temperature, though isotherms measured with a Langmuir balance change only modestly with temperature. Brewster angle microscopy images of the monolayer morphology are consistent with the notion that the monolayer is extremely rigid at 20−21 °C, while it has somewhat more fluidity at 28 °C. Polarization-modulated infrared reflection absorption spectroscopy results also indicate a qualitative difference between the characters of the monolayer at the two temperatures. The Wilhelmy plate method is sensitive to this difference, but its limited accuracy in the case of very rigid films results in a response that greatly amplifies the character of this change as compared to other means of probing the monolayer structure.
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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 | 0.001 |
| 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".