Architectural Polymers, Nanostructures, and Hierarchical Structures from Block Copolymers
Bibliographic record
Abstract
Block copolymers self-assemble in the solid state and in block-selective solvents. In the case of a solid diblock copolymer, the minority block segregates from the majority block to form periodically spaced regular domains. The domains can take the shape of spheres, cylinders, gyroids, or lamellae, depending on the volume fraction of the minority block. In a block-selective solvent, a block copolymer self-assembles into micelles. The micellar shape is determined by the composition of the block copolymer, and the interfacial tension between the insoluble block(s) and the solvent. Also coexisting with the micelles are single-chain micelles. This article reviews our efforts in utilizing these self-assembly properties of block copolymers to prepare block copolymer architectures. These architectures include architectural polymers, nanostructures, and hierarchical structures. Two major strategies that we have used to modify the self-assembled structures of block copolymers have included directed assembly and chemical processing of the assembled structures. In directed assembly, we physically modify the self-assembly process. We combined emulsification with block copolymer assembly and created special environments, such as confined volumes or 2D spaces, for block copolymer self-assembly to take place. Through chemical processing, we modify the self-assembled structures chemically. We have been able to ‘lock in’ the assembled structures of block copolymers and/or perform selective domain degradation. After structural locking, ‘permanent’ structures such as nanostructures and architectural polymers were produced. These permanent structures could be further chemically processed or assembled to yield more complex structures, including hierarchical assemblies. We will give an overview of the strategies that we use for block copolymer architecture preparation. Reviewed in some detail are our most recent research developments, which involved the use of block copolymers as precursors for architectural polymers.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.063 | 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".