Polyurethanes for Shape Memory Foams
Bibliographic record
Abstract
Shape memory polyurethane (SMPU) foams with cellular and porous structure are considered as promising multi-functional polymeric structures that have been used for a wide-spectrum of applications and industries. Numerous studies have focused on the chemistry, formulation and production processes of polyurethane foams (PUFs) and their microstructure-mechanical performance correlation. Despite the extensive early study on the microstructure and the mechanisms involved in the evolution of the PUF cells and their structures, little study and investigation have been made on their shape memory performance (SMP). In this chapter, the general chemistry of PUFs will be briefly discussed, and since the cell opening mechanisms plays a central role on the final PUF structure, application and tuning its mechanical performance, it will be covered in detail. The microstructural evolution of PUFs, the impact of nanoparticles on cell structure and mechanical behavior will also be discussed in detail. Finally, the SMP of polyurethanes (PUs) in general, PUFs and its future prospects will be studied and discussed in detail.
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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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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".