Tuning the Degradability Profiles of Polyesters with Indium-Catalyzed Incorporation of Poly(ε-thiocaprolactone) Blocks
Why this work is in the frame
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Bibliographic record
Abstract
There are no examples of high molecular weight (>100 000 g/mol) poly(ε-thiocaprolactone) (PtCL), and the mechanism of ε-thiocaprolactone (tCL) polymerization with organometallic complexes has not been investigated. In this work, we demonstrate the synthesis of the highest reported molecular weight PtCL ( M n = 109 000 g/mol) by using a cationic indium thiolate catalyst formed in situ via the addition of benzyl mercaptan. The mechanism of the polymerization is thoroughly investigated and the reaction coordinate is elucidated via computational calculations; the polymerization propagates through a coordination–insertion mechanism. If the PtCL is not isolated during the polymerization, the resulting indium-PtCL macromolecule can be used as an initiator to form copolymers with poly(lactide) (PLA) and poly(ε-caprolactone) (PCL). Incorporating 10% PtCL in these polymers alters their degradation behavior: the hydrolytic degradation period of PLA is reduced by nearly half, while PCL becomes more resistant to hydrolysis.
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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 | 0.001 | 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it