High Temperature High Pressure Tandem Polymerization of Ethylene for Synthesis of Ethylene‐1‐Hexene Copolymers from Single Reactor with SNS‐Cr and CGC‐Ti Catalysts
Bibliographic record
Abstract
Ethylene‐1‐hexene copolymers are synthesized from ethylene using the tandem catalyst system of bis(2‐dodecylsulfanyl‐ethyl)amine‐CrCl 3 (SNS‐Cr) and [( η 5 ‐C 5 Me 4 )SiMe 2 ( t BuN)]TiCl 2 (CGC‐Ti), with MAO as co‐catalyst. The tandem polymerization is carried out in a high‐temperature high‐pressure solution process. SNS‐Cr trimerizes ethylene and generates 1‐hexene with high selectivity. CGC‐Ti copolymerizes ethylene with 1‐hexene and produces the ethylene‐1‐hexene copolymers. A short period of pre‐trimerization is effective in increasing the 1‐hexene content in copolymer and producing chains with uniform microstructure. The products prepared by this tandem system at high temperature and high pressure exhibit competitive mechanical properties with a commercial ethylene‐1‐octene copolymer.
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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 | 0.000 |
| 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".