Adsorption of block polymers on well-defined silica surfaces
Why this work is in the frame
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Bibliographic record
Abstract
Block copolymers of polyethylene oxide and polystyrene have been examined in the Surface Force Apparatus and their adsorption on mica is well understood. The results of the measurements suggest that these block copolymers can be subdivided into three compositional groups according to Marques/Joanny theoretical elationships. The main focus of the SFA investigations was to determine the extended length of the polymer brush as this in turn is known to affect the flocculation-deflocculation behavior of particles. This paper describes the use of a “colloidal cell” which can be used to prepare dispersions of silica particles in carbon tetrachloride using a totally evacuated system. The surface of this silica has been defined by heat treatment in vacuo. The cell also enables infrared spectroscopy to be applied to the dispersion. The adsorption of the polymer, the specific interactions of the polyethylene oxide and polystyrene segments with the surface and the rate of settling of the particles can be quantified. Block copolymers with three different asymmetries have been examined and the results compared with data obtained for polyethylene oxide and polystyrene homopolymers.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.002 | 0.002 |
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