Maleated Ethylene-Propylene Random Copolymers: Determination of the Microstructure and Association Level by Fluorescence Spectroscopy
Bibliographic record
Abstract
A maleated ethylene-propylene (EP) random copolymer was labeled with the fluorescent dye 1-pyrenebutanoicacid hydrazide to yield EP−Py. Fluorescence spectroscopy was used to determine the microstructure of EP−Py (i.e., the distribution of the pendants along the chain) in THF where little association is expected to occur between the polar pendants. In hexane, an apolar solvent, associations take place between the polar pendants and the association level of EP−Py (i.e., fractions of pendants, which are associated and unassociated) was estimated by analyzing quantitatively both the monomer and the excimer fluorescence decays. The ability of pyrene to form an excimer was used to carry out this study. The excimer formation process was monitored by using a combination of two models, namely the sequential model and the blob model. Both monomer and excimer decays were analyzed in order to completely describe the distribution of pyrene groups. It was found that 70% of all pyrene groups are located at small distances from one another and form excimer readily. In apolar hexane, 87% of all pyrene groups are involved into loose pyrene aggregates, held together via polar interactions between the succinic anhydride groups.
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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 | 0.001 |
| 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".