The Effect of Aging Time in Dispersion on Polymer Diffusion in Films Formed From a Waterborne 2-Component Polyurethane Formulation
Bibliographic record
Abstract
Waterborne polyurethane coatings are environmentally friendly alternatives to their solventborne counterparts. Waterborne 2-component polyurethane coatings comprise polyol nanoparticles and polyisocyanates (PIC) and are of great interest due to their excellent mechanical properties. I used fluorescence resonance energy transfer to study polymer diffusion in films formed from a dispersion consisting of a polyol latex containing primary hydroxyl groups (Mn(GPC) ≈ 5000 g/mol, Đ ≈ 2, Tg ≈ 15 °C) and a hydrophilically modified PIC (hmPIC) (Basonate® HW1000). My contribution was to examine the effect of aging time in the dispersion before applying the coating. I found that aging dispersions of the polyol plus hmPIC up to 9 h did not reduce hmPIC effectiveness in the coating. After 9 h of aging in the dispersion, a substantial fraction of the isocyanate groups had reacted with water, and the ability of the hmPIC to promote polymer diffusion in the films was greatly reduced.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".