Recyclable and Sustainable Natural Rubber Biocomposite Vitrimers Induced by Dynamic Anhydride–Epoxy Bonds
Bibliographic record
Abstract
Research into rubber vitrimers as a sustainable alternative to traditional static crosslinked rubber systems for developing reprocessable and recyclable rubber materials is both promising and gaining substantial interest. This study aims to investigate the impact of cellulose nanocrystals (CNCs) and maleic anhydride-modified CNC (CNC-MA) as functional fillers in a natural rubber (NR) anhydride–epoxy transesterification vitrimer system. CNC modification and vitrimer thermomechanical properties (glass transition and vitrimer transition) of the resulting vitrimer composites were then evaluated using FTIR spectroscopy, NMR spectroscopy, XRD, tensile testing, DMA, DSC, swelling tests, etc. The resulting NR-MA vitrimers showed enhanced mechanical properties (20–37.6%, at 5 phr loading levels). Despite providing a modest improvement in mechanical properties, CNC-MA, acting as both a dynamic crosslinker and a reinforcing agent, displayed improved and superior interfacial compatibility at all loadings. Overall, sustainable modified nanofillers, such as CNCs, offer a promising strategy to dynamically crosslink rubber and overcome inherent filler–polymer incompatibilities, such that it can compete with traditional vulcanized rubber.
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| 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".