Low temperature <scp>ATRP</scp> of <scp>POSS‐MA</scp> and its amphiphilic pentablock copolymers
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Bibliographic record
Abstract
Abstract A low temperature ATRP of methacryloisobutyl POSS (POSS‐MA) is carried out, using poly(propylene glycol) (PPG)‐based macroinitiator, in toluene with CuCl/PMDETA as the catalyst system, generating well‐defined P(POSS‐MA)‐ b ‐PPG‐ b ‐P(POSS‐MA) triblock copolymer with Ð ~ 1.1. The semilogarithmic kinetic plot reveals first‐order kinetics and the dispersity is observed to decrease as the reaction progresses—an indication of the controlled behavior of the polymerization. To assess the chain‐end fidelity of the produced block copolymer, chain extension is carried out with oligo(ethylene glycol methacrylate) (OEGMA) that afforded water‐soluble P(OEGMA)‐ b ‐P(POSSMA)‐ b ‐PPG‐ b ‐P(POSSMA)‐ b ‐P(OEGMA) pentablock copolymers. The SEC profiles suggest a quantitative initiation by the macroinitiator. By varying the monomer to initiator molar ratio, block copolymers with various P(OEGMA) chain lengths, ranging from 19 to 58 units on each side have been achieved with relative lower dispersity ( Ð < 1.4). Kinetic analysis of the ATRP of OEGMA, with P(POSSMA)‐ b ‐PPG‐ b ‐P(POSSMA) as the macroinitiator, suggests first‐order kinetics and controlled nature of the polymerization. The PPG and P(OEGMA) segments impart a thermosensitive character to the obtained water‐soluble amphiphilic hybrid block copolymers; hence they display temperature‐dependent self‐assembly behavior in aqueous medium.
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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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| 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