Synthesis and Flame Retardant Properties of a Novel Cyclotriphosphazene-based Epoxy Resin
Bibliographic record
Abstract
Hexa-(4-aldehyde-phenoxy)-cyclotriphosphazene(HAPCP) was obtained by nucleophilic substitution reaction of hexachlorocyclotriphosphazene with p-hydroxybenzaldehyde.Hexa-(4-carboxyl-phenoxy)-cyclotriphosphazene(HCPCP) was synthesized by oxidation reaction of HAPCP with KMnO4.A novel phosphorus-containing flame retardant epoxy resin(PN-EP) based on cyclotriphosphazene was successfully synthesized by ring opening and closing reaction of HCPCP with epichlorohydrin using benzyltriethylammonium chloride as the catalyst.The structure and thermal stability were characterized by1H NMR,IR and TGA.PN-EP was cured by diaminodiphenyl methane and the flame retardant properties of the thermoset were investigated through limiting oxygen index(LOI) and vertical burning test(UL-94).The results showed that the initial thermal decomposition temperature of PN-EP was 278 ℃ and the char residue remained 40.5 wt% at 700 ℃ and PN-EP had a high thermal stability and charring forming ability.The cured sample can successfully pass UL-94 V-0 rating with the LOI value of 33%.
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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".