Evaluating different alkyl ammonium modified organoclays in preparation of TPO nanocomposites with supercritical CO<sub>2</sub>
Bibliographic record
Abstract
This article examines the chemical structures of the surfactants associated with organically modified montmorillonites in order to understand how differences in the structure may influence the final properties of the nanocomposite materials. Five organically modified montmorillonites with different surfactants were examined in materials prepared using a novel technique for thermoplastic polyolefin nanocomposites, using supercritical CO 2 as a processing aid. The chain length and the number of alkyl chains attached to the quaternary ammonium surfactant were the main variables of study aimed at changing the interactions of an organoclay with compatibilizer and/or polymer matrix due to the CO 2 treatment. The goal of this work was to improve the exfoliation of the dispersed organoclay. The intermediate masterbatch containing organoclay and compatibilizer as well as the final TPO nanocomposites were characterized using X‐ray diffraction (XRD), transmission electron microscopy (TEM), and rheological analysis. The results showed that of the systems tested, significant changes in the state of exfoliation after processing with the supercritical fluid occurred only for surfactants possessing dialkyl tails and exhibiting a paraffin type arrangement within the montmorillonite. POLYM. COMPOS., 35:1592–1602, 2014. © 2013 Society of Plastics Engineers
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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".