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 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".