Stabilization of the C15 Phase in Binary Blends of Asymmetric AB<sub>2</sub> Linear-Branched Block Copolymers and B-Homopolymers
Bibliographic record
Abstract
Two sets of binary blends were prepared by mixing core-selective B-homopolymers with either symmetric AB 2 or asymmetric AB 1 (B 2 ) linear-branched block copolymers, aiming to unravel the architectural effects on the formation of complex structures in polymer blends. The spatial distribution of homopolymers depends critically on both the copolymer architecture and homopolymer size. For short homopolymers, symmetric AB 2 blends exhibit a cylinder-to-lamellae transition as the homopolymer loading increases, while their asymmetric counterparts follow a transition sequence from spheres to cylinders and then to double gyroids. When long homopolymers are added, symmetric AB 2 block copolymers retain their initial cylindrical structures, whereas the Frank–Kasper σ and C15 phases are stabilized in the asymmetric systems. These precisely defined blends eliminate molecular uncertainties arising from molecular weight distribution and compositional variations. Our results underscore the significant impact of architectural symmetry on homopolymer partitioning that leads to distinct equilibrium morphologies, providing key insights into rational structural engineering via simple blending.
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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 | 0.001 | 0.002 |
| 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".