PEO Penetration into Water-Plasticized Poly(vinylphenol) Thin Films
Bibliographic record
Abstract
Neutron reflectivity was used to characterize the adsorption of poly(ethylene oxide) (PEO), 150 kDa, on both polystyrene (PS) and poly(vinylphenol) (PVPh), thin films in water. The PVPh films had thicknesses of 434 and 438 Å and contained 9% v/v water in contrast to the 492 Å PS film which contained no water. PEO did not adsorb on the PS film, while the specific adsorption of PEO on the PVPh film was 1.2 mg/m 2 at pH = 6.6. Reflectivity profiles from both deuterated and hydrogenated PEO in D 2 O provided a comprehensive picture of PEO on/in the PVPh film. The PEO distribution was modeled by two uniform layers. The external layer was a 30 Å thick corona of PEO (12.5%v/v) in water. Between the corona and bulk PVPh film was a 25 Å interpenetration layer consisting of 22% PEO, 76% PVPh, and 2% water. Since the interpenetration layer accounted for 45% of the bound PEO, it is proposed that about half of each adsorbed PEO molecule enters the PVPh film. Thus, the PEO interaction with a PVPh hydrogel can be considered as an example of a polymer/polymer complex formation leading to nanoscale PEO/PVPh blend coated with a water-swollen PEO corona.
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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) | 0.002 | 0.001 |
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; both teacher heads agree on what is shown here.
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".