Silicone Structurants for Soybean Oil: Foams, Elastomers, and Candles
Bibliographic record
Abstract
Soybean oil-derived polyurethanes, while much greener than those derived from isocyanates, have a problematic combustion profile; concerns exist about the nitrogen-containing compounds found in the smoke. Silicones typically burn cleanly to form an insulating silica layer upon combustion. We have examined the ability of silicones to convey improved thermal stability to soybean oil. The oil was modified via an ene reaction to incorporate an alkoxysilane functionality that was used in a subsequent Piers–Rubinsztajn reaction with silicones to create foams and elastomers. Cross-linked materials with densities ranging from ∼0.6 to 0.9 g/mL and containing up 76% by weight soybean oil were prepared. The addition of varying amounts of a linear PDMS chain extender allowed for control of the modulus (0.04–0.32 MPa). Cross-linking rapidly occurred, <60 s for full cure. Foams were produced without the need for external blowing agents, due to the generation of methane as a byproduct of the Piers–Rubinsztajn reaction. The soybean oil/silicone materials burned cleanly and without dripping, as shown in particular with the elastomer containing 76 wt % soybean oil. The external surfaces of the objects, after combustion, were rigid silica-rich structures.
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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".