Ultratough Co-Continuous PLA/PA11 by Interfacially Percolated Poly(ether-<i>b</i>-amide)
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
It will be shown that when polyether- b -amide (PEBA) is added to a PLA/PA11 blend, it tends toward the interface and results in a significant increase in the impact strength when all three phases are fully percolated. The addition of the elastomeric PEBA phase to the binary PLA/PA11 blend replaces a rigid PLA/PA11 interface with a much more deformable one. The further addition of PEO to PLA results in an ultratough material with an impact strength of ∼750 J/m, which is approximately 40 times greater than the original co-continuous PLA/PA11 blend. The tensile toughness and notched Izod impact strength are significantly influenced by the critical co-continuous composition region of the PLA/PA11 binary system and a minimum concentration to form a fully percolated PEBA layer at the co-continuous PLA/PA11 interface. The added PEO is also found to enhance the interfacial interactions and the chain mobility of PLA. The combined effects of co-continuity, strong interfacial interactions, a deformable interface, and sufficient PLA chain mobility are all essential to achieving ultratough behavior in PLA/PA11. Examination of the fracture surface of the ultratough material after impact indicates significant voiding. It is suggested that the stress-field overlap within the deformable PEBA phase in conjunction with suitable interfacial adhesion changes the failure mode from crazing to shear yielding. These results establish a strategy for the toughening of multiphase polymer blends, especially in the vicinity of the co-continuous region.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.002 |
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 it