Toughness enhancement of polyamide 6,12 with intermolecular hydrogen bonding with <scp>3‐pentadecylphenol</scp>
Bibliographic record
Abstract
Abstract Due to the brittle performance of polyamide 6,12 (PA6,12) in high impact environment, we report a facile, efficient, and scalable method to toughen PA6,12 by establishing intermolecular hydrogen bonding (H‐bonding) interaction with 3‐pentadecylphenol (PDP). Interestingly, the intermolecular H‐bonding interaction obviously hindered PA crystallization, which was evidenced by decrease of crystalline temperature from 186.8 to 175.8°C and prolong of crystallization half‐time from 0.27 to 0.37 min, when the amount of PDP was increased to 30 wt%. Consequently, the toughness of the PA6,12/PDP composites containing 30 wt% PDP was improved and their notched impact strength reached to 17.5 kJ m−2, about three times higher than that of the neat PA6,12. It was deduced that both plasticizing effect and intermolecular H‐bonding interaction played critical roles in PA6,12 resultant composites toughness, which opens a new perspective of PA6,12 toughening for a wide range of applications.
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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 | 0.000 |
| 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 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".