Polyethylene Melt Adsorption and Desorption during Flow on High-Energy Surfaces: Characterization of Postextrusion Die Wall by Laser Scanning Confocal Fluorescence Microscopy
Bibliographic record
Abstract
In this paper we report results that delineate the state of polymer adsorption on high-energy surfaces following no-slip and slip flow. The experiments were performed by precoating a slit die wall made of a silicon wafer with a thin layer of fluorescent dye-labeled-polyethylene (FPE) and then extruding through the slit die a nonfluorescent polyethylene both below and above the interfacial stick−slip transition (SST). Using a laser scanning confocal fluorescence microscope, the postextrusion die walls were examined to check for the existence of the preadsorbed FPE. It is shown that the preadsorbed fluorescent polyethylene (PE) chains were still present after the stick−slip transition. The presence of adsorbed polymer chains following slip flow supports the previously proposed “cohesive” mechanism for the SST of PE on highly adsorbing surfaces.
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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) | 0.001 | 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".