In-Situ NMR Measurement of Reactivity Ratios for Copolymerization of Methyl Methacrylate and Diallyl Dimethylammonium Chloride
Bibliographic record
Abstract
The present work examines an in-situ NMR technique for the copolymerization of methyl methacrylate (MMA) and diallyl dimethylammonium chloride (DADMAC). The copolymer poly(MMA-co-DADMAC) contains monomers of significantly different polarities, making it challenging to measure DADMAC incorporation. The conventional technique for accurate measurement of monomer reactivity ratios in copolymers is time consuming, requiring a large number of experiments, in addition to being challenging for isolation/analysis of formed copolymers from this heterogeneous polymerization. The results show that the reactivity ratios were insensitive to temperatures between 60 and 80 °C, while the reactivity ratios of MMA were found to be much higher than that of DADMAC. The results were comparable to those obtained by the conventional technique. Due to the heterogeneous nature, the measured reactivity ratios are considered as apparent reactivity ratios but important for modifying poly(methyl methacrylate) with DADMAC by copolymerization, enabling design and development of copolymers with desired composition for specific end-use applications.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".