Synthesis and Characterization of Core‐Shell Bottlebrush Polymers via Controllable Polymerization
Bibliographic record
Abstract
Abstract This research was focused on the synthesis of well‐defined bottlebrush polymers (BBPs) comprising of polynorbornene (PNB) backbones and side‐chains of the polylactide (PLA)‐b‐polystyrene (PS). The PNB backbones were synthesized via ring‐opening metathesis polymerization of norbornene, and then L‐lactide (LA) was first grafted to the backbones to form PLA side‐chains by ring‐opening polymerization. Afterwards, styrene was further grafted to the PLA cantilever with triothiocarbonate modification via reversible addition‐fragmentation chain transfer polymerization to form PLA‐b‐PS side‐chains. Controllable polymerization was achieved by introducing each block in stages. A novel structure with PLA and PS block arranged in tandem was constructed, and their morphologies of self‐assembly in bulk were investigated by transmission electron microscopy imaging. The results demonstrated that the compositions and molecular weight of the side‐chains in the BBPs affected the self‐assembling morphologies of the BBPs significantly, and revealed that the polymers were with core‐shell structures.
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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".