Synthesis and Characterization of Isobutylene-Based Ammonium and Phosphonium Bromide Ionomers
Bibliographic record
Abstract
The preparation of isobutylene-based ionomers through displacement of halide from brominated poly(isobutylene- co -isoprene) (BIIR) by triphenylphosphine (PPh 3 ) and N, N -dimethyloctylamine (DMOA) is demonstrated. While the resulting phosphonium and ammonium bromide salts (IIR-PPh 3 Br and IIR-NR 3 Br, respectively) possess dynamic mechanical properties that are comparable to thermoset vulcanizates, the elastomeric network is the result of ion-pair aggregation. Evidence of intra- and intermolecular aggregation provided by dynamic mechanical and dilute solution viscosity analyses is reinforced by studies of 1 H NMR spin−spin relaxation, which demonstrate the reduced mobility of those polymer chain segments proximal to the phosphonium bromide functionality within IIR-PPh 3 Br.
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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".