Synthesis and characterization of polystyrene oligomers with several pendent epoxy groups
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Living polystyryl lithium was synthesized by anionic polymerization under the protection of argon at normal pressure, and styrene, toluene, tetrahydrofuran, and n ‐butyllithium were used as a monomer, solvent, polar reagent, and initiator, respectively. Then, polystyrene oligomers containing several pendent epoxy groups with well‐defined structures and narrow molecular weight distributions (weight‐average molecular weight/number‐average molecular weight < 1.1) were prepared by the reaction of polystyryl lithium with glycidyl methacrylate. The prepared oligomers were characterized with gel permeation chromatography, Fourier transform infrared spectroscopy, 1 H‐NMR, and the hydrochloric acid/dioxane argentimetric method. The effects of the glycidyl methacrylate dosage, molar mass of polystyrene precursors, copolymerization time, and temperature on the content of side epoxy groups were also investigated. The results confirm that 1,1‐diphenylethylene‐end‐capped polystyryl carbanion could initiate glycidyl methacrylate in toluene in the presence of lithium chloride and a small amount of tetrahydrofuran, and the content of the side epoxy groups could be adjusted. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
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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 | 0.000 | 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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