Effect of the branching morphology of a cationic polymer flocculant synthesized by controlled reversible‐deactivation radical polymerization on the flocculation and dewatering of dilute mature fine tailings
Bibliographic record
Abstract
Abstract One of the methods used to treat oil sands tailings is to add water‐soluble polymer flocculants to create large flocs that settle to the bottom of the ponds, allowing the supernatant water to be recovered and reused in the oil extraction process. However, a systematic study of how polymer branching affects flocculation has not yet been done to date. Poly((vinylbenzyl)trimethylammonium chloride) (PVB), a cationic and partially hydrophobic polymer, is the focus of this paper. Its positive charges make it adsorb strongly on the negatively charged clay particles, and its partial hydrophobicity produces flocs that retain less water. We synthesized PVB in linear, 3‐arm star, and 4‐arm star configurations using activators regenerated by electron transfer atom transfer radical polymerization. The 3‐arm star polymer outperformed its linear counterpart at every dosage in the initial settling rate tests, while the 4‐arm star polymer performed well only at high dosages. All polymers had similar dewatering performances.
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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 | 0.000 |
| 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 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".