Mechanical and water absorption behavior of thermoset matrices reinforced with natural fiber
Bibliographic record
Abstract
Abstract In this work, we investigate the effect of the Posidonia Oceanica fiber (POF) rate and matrix type on the mechanical properties and water absorption behavior of the produced composites by compression molding process. The obtained results show that the stiffness, strength and hardness of unsaturated polyester resin (UPR)/POF composite increase with POF reinforcement rates. Further, the choice of matrix plays in important role on the flexural properties of the composites. At equal percentage of POF (20 wt%), UPR/20POF composite shows the best flexural modulus compared to Epoxy/20POF composite. By contrast, the maximum deflection of UPR/20POF is approximately three times less important than the Epoxy/20POF composite. In addition, in the case of UPR/POF composite, water absorption tests revealed that the percentage of water content was found to increase with POF content. It was observed that the water absorption pattern of the all formulation of the composites was found to approach the Fickian diffusion behavior. It was also proven that the moisture resistance of UPR/20POF composite is greater than Epoxy/20POF composite. Compared to literature, composite reinforced with higher load of POF (UPR/30POF) exhibits higher dimensional stability, which explains their importance when it will be used for application in humid environment.
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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) | 0.002 | 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".