Synthesis of Block Copolymers Possessing Fluoropolymer and Non-Fluoropolymer Segments by Radical Polymerization
Bibliographic record
Abstract
The synthesis of block copolymers comprising fluoropolymer and non-fluoropolymer segments is reported. The synthetic method is based on chain transfer emulsion polymerization of fluoromonomers and their subsequent employment as macroinitiators in atom transfer radical polymerization (ATRP) of non-fluorinated vinyl monomers. Trichloromethyl-terminated copolymers of vinylidene difluoride (VDF) and hexafluoropropylene (HFP), possessing molecular weights up to 25 000 g/mol, were obtained by emulsion polymerization in the presence of chloroform and used to initiate the ATRP of styrene (St) and methyl methacrylate (MMA) to form a series of P(VDF- co -HFP)- b -PS and P(VDF- co -HFP)- b -PMMA block copolymers. NMR, GPC, DSC, and TEM analysis confirmed the compositions of the block copolymers. The polymers exhibited a phase-separated morphology in the solid state and possessed distinct glass transition temperatures associated with fluoropolymer, PS, and PMMA domains.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.002 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".