Syntheses, Structures and Proton Conductivities of Polyphthalazinone Ionomers Derived from a Direct NC Coupling Reaction
Bibliographic record
Abstract
Abstract Summary: Nafion perfluorinated resins that contain perfluorosulfonic acid groups have outstanding properties as membranes in polymer electrolyte membrane (PEM) fuel cells when used only at temperatures lower than 80 °C. At higher temperatures, dehydration of the membrane occurs with a concomitant loss of conductivity. In this paper, we report a new approach to synthesize polyphthalazinone ionomers via an NC coupling reaction. The sulfonated polymers produced showed excellent thermal and oxidative stability because of their specially designed structure. Membranes cast from solution possessed good water affinity and high proton conductivity. Different bisphthalazinone monomers resulted in varying properties of the corresponding polymers. The membranes exhibited excellent resistance both to hydrolysis and oxidation, demonstrating their promising application as proton exchange membranes in PEM fuel cells. The relationship between the structure and properties for the synthesized polymeric ionomers was discussed. Polyphthalazinone ionomers. magnified image Polyphthalazinone ionomers.
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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) | 0.000 | 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".