Thermoplastic-Thermosetting Merged Polyimides Derived from Furan-Maleimide
Bibliographic record
Abstract
Novel thermoplastic-thermosetting merged polyimide system has been developed via Diels-Alder intermolecular reaction of bisfuran A namely, 2,5-bis(furan-2-ylmethyl carbamoyl)terephthalic acid with a series of bismaleimides B1-3 containing aliphatic chain in the backbone. The intermediate Furan - maleimide Diels-Alder adducts C1-3 were aromatized and imidized (i.e. cyclized) through carboxylic and amide groups to afford thermoplastic-thermosetting merged polyimides D1-3. Synthesized polyimides were characterized by elemental analysis, spectral features, number average molecular weight (Mn) and thermal analysis. Bulk polymerization was also carried out. Proof of structures was based mainly on a comparison of infrared spectra of polyimides with those of the corresponding model compound 4 prepared from 2-(furan-2-ylmethylcarbamoyl) benzoic acid in the similar way. FTIR spectral features of polyimides D1-3 were quite identical with the model compound 4. The ‘in situ’ void - free glass fiber reinforced composites GFRC1-3 were prepared and characterized by mechanical, electrical and chemical properties. The ‘in situ’ produced polyimides show good adhesion to glass fibers. All the composites depicted good mechanical and electrical properties and good resistance to organic solvents and mineral acids.
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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".