Atom Transfer Radical Copolymerization of Bacterial Poly(3-hydroxybutyrate) Macromonomers and Methyl Methacrylate
Bibliographic record
Abstract
PHB macromonomers and methyl methacrylate were copolymerized by atom transfer radical polymerization (ATRP) methods. Kinetic studies are reported and compared to ones obtained for conventional free radical polymerization (FRP). Graft copolymers produced by ATRP were of lower polydispersity (ca. 1.2) than the ones prepared by FRP (1.6−2.1), but also of lower molecular weight (ca. 20 000 for ATRP, 31 800−84 100 for FRP). With both techniques, the addition of PHB macromonomers, compared to MMA, was faster on a propagating chain with an MMA active center at low molar feed ratio of PHB macromonomers. The gradual decrease of PHB macromonomers reactivity compared to the one for MMA, with increasing proportion of macromonomers in the comonomer feed, affected the microstructures of the graft copolymers produced by 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 | 0.000 |
| 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".