Preparation of super high molecular weight PAM / AA and determination of reactivity ratios
Bibliographic record
Abstract
Acrylamide( AM) and acrylic acid( AA) was used as raw materials to synthesize water-soluble high molecular weight poly( acrylamide-co-acrylic acid)( PAM / AA) copolymer. The orthogonal test was designed to study the effects that the concentration of AM,the mass ratio of AM to AA,the mass ratio of initiator to AM,the mass ratio of CO( NH 2) 2 dosage to AM and reaction temperature on the molecular weight of PAM / AA copolymer. The result showed that the optimal condition was: m( AM) ∶ m( H 2 O) = 30%,m( AM) ∶ m( AA) = 3,m( I) ∶ m( AM) = 0. 3%,m[CO( NH 2) 2 ]∶ m( AM) = 0. 3%,temperature was 20 ℃,and M r of the optimal copolymer was higher to 5. 12 × 108,the reactivity ratio of AM and AA were 0. 684 and 0. 278 estimated by integral method and the residual monomer concentration was measured by ultraviolet spectrophotometry.
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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 | 0.001 | 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".