Microwave Synthesis and Melt Blending of Glycerol Based Toughening Agent with Poly(lactic acid)
Bibliographic record
Abstract
High Resolution Image Download MS PowerPoint Slide Glycerol is a byproduct of the biodiesel industry. The target of the following work was to produce a biopolyester based on glycerol, and to blend it with poly(lactic acid) (PLA) to increase its ductility. Microwave synthesis was used to conduct the reactions of glycerol with a diacid (sebacic acid) and a monoacid (stearic acid) at 180 °C in bulk. Progress of the synthesis was stopped when a gel was obtained (after 3.45 h). The produced resin was found to be soluble in tetrahydrofuran (THF). The study of the product by infrared spectrometry showed an effective esterification of acids with glycerol. Calorimetric study evidenced a glass transition at −27 °C and a melting peak at 29 °C. PLA was then blended with various amounts of this biopolyester ranging from 0 to 20% via twin screw extrusion followed by injection molding. Morphologic characteristics of blends were studied by scanning electron microscopy. Biopolyester phases ranging from 100 nm to 10 μm were observed for all concentrations. In the particular case of 20% of biopolyester, micrometric phases greater than 10 μm in size were detected, leading to a decrease in mechanical performance. Tensile testing showed a ductile behavior for all concentrations higher than 5% of biopolyester, with an optimum performance achieved with 10% of biopolyester in which strain at break reached 93%.
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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".