Compatibilization of Poly(styrene‐acrylonitrile) (SAN)/Poly(ethylene) Blends via Amine Functionalization of SAN Chain Ends
Bibliographic record
Abstract
Styrene/acrylonitrile (SAN) copolymers with low polydispersity (1.10–1.30) are synthesized by nitroxide mediated polymerization (NMP) in dimethylformamide (DMF) solution with a succinimidyl ester (NHS) terminal group from the N ‐tert‐butyl‐ N ‐[1‐diethylphosphono‐(2,2‐dimethylpropyl) nitroxide] (SG1) residue. These copolymers are thermally stabilized by removing the SG1, and then modified to form primary amine end‐functional SAN (SAN‐NH 2 ). Proton nuclear magnetic resonance spectroscopy ( 1 H NMR) and Fourier‐transform infrared spectroscopy (FT‐IR) indicated that the amine group is effectively placed at the chain end at a level of 90%. SAN‐NH 2 is reactively blended with maleic anhydride grafted poly(ethylene) (PE) at 20 wt.% loading at 180 °C and the resulting morphology is compared against the non‐reactive blend. Scanning electron microscopy (SEM) indicates finer SAN domains ∼ 1 µm which are thermally stable upon annealing in the reactive case. The dispersed SAN domains are reoriented using a channel die to impart elongated domains with aspect ratios ∼ 14, which would be desirable for barrier materials.
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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 | 0.000 | 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) | 0.000 | 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".