Feasibility Analysis of Surface Mediation in Supported Atom Transfer Radical Polymerization
Bibliographic record
Abstract
Supported catalysts are used in atom transfer radical polymerization (ATRP) to facilitate catalyst recovery and recycling. These catalysts consist of catalytic sites that are covalently tethered to larger supporting particles. It is generally believed that supported ATRP is a surface-mediated polymerization process; that is, both activation and deactivation reactions take place at the surface of the particles. However, recent experiments show that this may not be the case. This paper provides a theoretical analysis to test the concept of surface-mediated ATRP. It is found that deactivation at the surface is unlikely. The geographic isolation of catalytic sites, rather than polymer diffusivity limitation, is primarily responsible for this infeasibility. A trace amount of free catalyst in solution that minimizes the geographic isolation is essential for mediating supported ATRP.
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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 | 0.001 |
| 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".