Self-Assembly of a Tail-End Pyridinium Polyamphiphile Complexed with <i>n</i>-Alkyl Sulfonates of Variable Chain Length
Bibliographic record
Abstract
A methylpyridinium tail-end polyamphiphile with a 12-methylene spacer was complexed with n -alkyl sulfonate surfactants of 4, 8, and 16 carbon lengths. The thermal and structural properties of these poly(12-methacryloyloxydodecyl-4-methylpyridinium sulfonate)s in the solid state were studied. The complexes with the two shorter surfactants self-assemble into a disordered lamellar-like morphology, with relatively short correlation lengths, similar to the parent Br-neutralized homopolymer. Two glass transition-like events are observed in the DSC thermograms and are ascribed to nanophase-separated nonionic and ionic subplanes, respectively. The complex with the longest surfactant displays thermotropic liquid crystalline behavior, with transitions between two different partially crystalline phases (related to surfactant tail-end crystallization), a smectic A-like mesophase, and the isotropic phase. Surprisingly, the lamellar spacings for all of the complexes are very similar to that of the parent polymer. Two possible structural models taking this into account are discussed.
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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) | 0.000 | 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 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".