Synthesis and Micellar Characterization of Novel Amphiphilic A−B−A Triblock Copolymers of <i>N</i>-(2-Hydroxypropyl)methacrylamide or <i>N</i>-Vinyl-2-pyrrolidone with Poly(ε-caprolactone)
Why this work is in the frame
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Bibliographic record
Abstract
Two novel A−B−A type amphiphilic triblock copolymers, namely poly( N -(2-hydroxypropyl)methacrylamide)- block -poly(ε-caprolactone)- block -poly( N -(2-hydroxypropyl)methacrylamide) (PHPMA- b -PCL- b -PHPMA) and poly( N -vinyl-2-pyrrolidone)- block -poly(ε-caprolactone)- block -poly( N -vinyl-2-pyrrolidone) (PVP- b -PCL- b -PVP), were synthesized and characterized. These polymers were prepared by free radical polymerization of N -(2-hydroxypropyl)methacrylamide and N -vinyl-2-pyrrolidone in the presence of a novel biodegradable, macromolecular chain-transferring agent, α,ω-poly(ε-caprolactone) dithiol (HS-PCL-SH). All triblock copolymers self-assembled in aqueous solutions to form supramolecular aggregates of 30−200 nm size. The critical aggregation concentration of the polymers ranged from 1 to 4 mg/L. The partition equilibrium constant ( K v ) of pyrene in the hydrophobic core of micelles was comprised between 2.5 × 10 5 and 4.2 × 10 5 . The triblock copolymer micelles were loaded by a dialysis procedure with 1−4% (w/w) of two model poorly water-soluble drugs, i.e., doxorubicin and amphotericin B. These triblock copolymers could prove useful as nanocarriers for the solubilization and transport of hydrophobic drugs. The bifunctional macromolecular chain-transferring agent reported in this work can also find application in the synthesis of a variety of novel A−B−A type biodegradable triblock copolymers.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| 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 it