Oxygen Diffusion and Permeability in Alkylaminothionylphosphazene Films Intended for Phosphorescence Barometry Applications
Bibliographic record
Abstract
This paper describes the application of a technique based on luminescence quenching to measure the diffusivity and permeability of molecular oxygen in a series of poly( n -alkylaminothionylphosphazenes) (C n PTP) and in un-cross-linked high molecular weight PDMS. The glass transition temperatures ( T g ) of these polymers decrease from 4 °C for n = 2 to −18 °C for n = 6. Experiments performed on thin films of these highly permeable polymers show that oxygen diffusivity is sensitive to the microstructure of these polymers and that the diffusion coefficient for oxygen increases as T g decreases. In contrast, the oxygen solubility in these polymers is not very sensitive to the nature of the alkyl substituent. Both the oxygen diffusion coefficient D O 2 and the oxygen solubility S O 2 are smaller for this series of polymers than for PDMS.
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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 | 0.000 | 0.000 |
| 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 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".