The Synthesis of Acrylate‐Based Macromonomers and Structured Copolymers by High‐Temperature Semi‐Batch Radical Polymerization: The Impact of Acrylate vs. Methacrylate Monomer Choice
Bibliographic record
Abstract
ABSTRACT High‐temperature starved‐feed semi‐batch radical polymerization is used to produce an isobornyl acrylate (iBoA) polymer solution with high macromonomer content without a mediating agent. The p(iBoA) macromonomer solution serves as an addition‐fragmentation agent to synthesize a blocky copolymer in a single‐pot sequential feeding process, as has been demonstrated using n‐butyl acrylate (BA) as the second monomer. The impact of monomer selection on the copolymer product is investigated by switching the second monomer to n‐butyl methacrylate (BMA) while keeping all other aspects of the operating strategy unchanged. Methodologies developed to verify macromonomer incorporation are used to compare the iBoA‐BA and iBoA‐BMA systems, with two‐dimensional liquid chromatography providing a clear contrast between the acrylate and methacrylate (co)polymer products. The comparison demonstrates the effect of monomer structure on the macromonomer addition‐fragmentation kinetics, with a blocky copolymer produced using the acrylate macromonomer only when an acrylate is used as the second monomer feed.
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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".