Phase Separation and Polymer Diffusion in Poly(vinyl acetate−butyl acrylate) Latex Films Prepared by Batch Miniemulsion Polymerization
Bibliographic record
Abstract
A series of poly(vinyl acetate−butyl acrylate) P(VAc−BA) latex particles, with a 4:1 weight ratio of VAc and BA, unlabeled and labeled with phenanthrene (Phe) as the donor and with 4‘-(dimethylamino)benzophenone (NBen) as the acceptor, were prepared by batch miniemulsion polymerization in the presence and absence of a chain transfer agent. The latex particles were characterized by a phase-separated morphology, and the dyes appeared to be localized in the BA-rich domains. One set of samples, which we refer to as “gel-free”, had a negligible gel content, whereas the gel-containing samples for the energy-transfer studies of polymer diffusion had a gel content of ca. 34%. For gel-free samples, diffusion led to complete mixing of donor- and acceptor-labeled polymer during the drying process, at even 4 °C, suggesting that the PBA-rich domains were continuous. For the gel-containing samples, the diffusion rate (for molecules not part of the gel network) was negligible at 22 °C but became significant at temperatures above 60 °C, suggesting that the BA-rich domains were trapped as occlusions dispersed in a PVAc-rich continuous phase.
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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 | 0.001 |
| 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".