Oxasilacycles Leading to UV-Curable Polymers: Synthesis and Application
Bibliographic record
Abstract
Many applications of polymeric materials desire and in certain instances require various functions in one family of polymeric architectures. In this work, synthetic routes and methods to obtain novel oxasilacycles and their use in polymer chemistry as both monomer and cross-linking agents are presented. Photoacid generators are used for the acid-catalyzed ring-opening polymerization of the synthesized oxasilacycles allowing photoinitiated and controlled polymerizations. The polymerization behavior and influence of different photoacids as well as the influence of catalyst loading are examined using in situ IR spectroscopy. The synthesized cyclic structures offer a broad variety in polymer chemistry. Oxasilaspirocycles can either homopolymerize or function as a cross-linking reactant in organic polymers. A polystyrene–hydroxyethyl methacrylate copolymer is cross-linked via polycondensation reactions of the oxasilaspirocycle. An isopropoxy-substituted oxasilamonocycle is synthesized for the modification of hydroxyl-terminated polydimethylsiloxanes for photoacid-initiated polymerizable telechelic structures. Additionally, the synthesis of multifunctional oligomers containing the photoacid generator unit and the cross-linking agent leads to highly cross-linked polydimethylsiloxane-based structures. In this system it is possible to predefine the gel content as well as the viscosity of the cross-linked polydimethylsiloxane after irradiation by the ratio of oxasilacycle to polydimethylsiloxane.
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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) | 0.001 | 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".