Domain Sizes Determination for Styrene−Isobutylene Block Copolymer Systems Using Solid-State NMR Spectroscopy
Bibliographic record
Abstract
Solid-state NMR techniques were used to evaluate the sizes of the dispersed domains and the interface between the minor and the major phase in heterogeneous block copolymer systems with a relatively poor degree of ordering. Proton spin−lattice relaxation measurements and spin diffusion experiments were carried out on five samples of linear and star block copolymers of styrene, styrene- co -indene, and isobutylene. The morphology of the dispersed phase was considered cylindrical for all samples. The diameters of the dispersed cylinders were found to range between 7.9 and 48.5 nm for the linear samples and 22.6 nm for the star block copolymer sample. The thickness of the interface was estimated to be between 1.0 and 1.3 nm for all samples. SAXS measurements were employed to confirm the validity of the NMR data analysis.
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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".