Amine Substitution Reactions of Brominated Poly(isobutylene-<i>c</i><i>o</i>-isoprene): New Chemical Modification and Cure Chemistry
Bibliographic record
Abstract
Nucleophilic substitution reactions of brominated poly(isobutylene- co -isoprene) (BIIR) with amines are characterized through studies of a model compound, brominated 2,2,4,8,8-pentamethyl-4-nonene (BPMN), and analysis of BIIR cure rheology. Nucleophilic amines do not accelerate HBr elimination from the allylic bromide within BIIR but readily engage in N-alkylation reactions with this functional group. N-Alkylation and accompanying proton-transfer reactions are shown to be reversible, and the distribution of allylic bromide, ammonium bromide salts, and their corresponding amines is dictated by equilibrium thermodynamics. N, N -Dimethyloctylamine and N -methyloctadecylamine undergo a single N-alkylation reaction with BPMN, while octylamine forms bis-N-alkylation products that can be used to generate stable cross-linked BIIR networks.
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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) | 0.001 | 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".