Study of Self-Diffusion of Hyperbranched Polyglycidols in Poly(vinyl alcohol) Solutions and Gels by Pulsed-Field Gradient NMR Spectroscopy
Bibliographic record
Abstract
In an effort to further understand the effects of molecular size and shape of macromolecular diffusants on the diffusion in hydrophilic polymer solutions and gels, hyperbranched polyglycidols have been synthesized as hydrophilic diffusants and characterized. Four of these hyperbranched polymers were selected for the study of self-diffusion by pulsed-field gradient NMR spectroscopy in poly(vinyl alcohol)−water systems. The effects of the molecular weight, size, and shape of the diffusant, polymer concentration, and temperature have been studied. For diffusants of similar molecular weight and without specific interactions, the activation energy decreases from the dendrimers to hyperbranched polymers and then to linear polymers. The results indicate that the molecular shape, and hence the molecular density distribution of the diffusants, is important in the diffusion process.
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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".