The crystallization of ultrathin films of polylactides — Morphologies and transitions
Bibliographic record
Abstract
Poly(L-lactide) ultrathin films of thicknesses between 10 and 80 nm were crystallized between 100 and 170 °C. Four different morphologies were obtained: single crystals, hedrites, dendrites, and spherulites. Dendrites were always obtained below 20 nm due to chain diffusion limitations, whereas, at larger thicknesses, the morphology heavily depends on the crystallization temperature. The thickness-temperature morphological map led to the observation of two transition temperatures, at 115 and 145 °C. Other parameters such as the lamellar thickness, melting temperature, and dendricity of the lamellae for 15 nm thick films show significant changes at these two temperatures. Those transitions occur at the same temperatures as Regime III/Regime II, and Regime II/Regime I transitions of the Lauritzen–Hoffman crystallization theory.Key words: polylactide, ultrathin film, crystalline morphology, single crystal, dendrite, spherulite, transition temperature, regime of crystallization.
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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) | 0.000 | 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 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".