Silanes as New Highly Efficient Co-initiators for Radical Polymerization in Aerated Media

doi:10.1021/MA702301X

Paper

Silanes as New Highly Efficient Co-initiators for Radical Polymerization in Aerated Media

Published Feb 19, 2008 · J. Lalevée, A. Dirani, M. El-Roz

Macromolecules

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110

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0

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Abstract

A large series of silanes are proposed as new co-initiators for radical photopolymerization. Silanes in the presence of benzophenone, isopropylthioxanthone, camphorquinone, or dyes (Eosin) are found highly reactive and, in many cases, even better than a reference amine co-initiator (ethyl dimethylaminobenzoate (EDB)). The ability of the silanes to initiate the polymerization process under air is excellent (better than with amines), and the inhibiting effect is reduced or eliminated. An enhancement of the polymerization rates Rp under air is even sometimes noted. For example, using isopropylthioxanthone/tris(trimethylsilyl)silane, Rp increases by a 2-fold factor when going from a laminate to an aerated medium. The hardness and the hydrophobic properties of the coatings have also been evaluated. The reaction mechanisms are discussed on the basis of laser flash photolysis experiments. Specific reaction pathways explain the unusual behavior under air.

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Study Snapshot

Silanes are highly efficient co-initiators for radical photopolymerization, with their ability to initiate the polymerization process under air being excellent and sometimes enhancing polymerization rates.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Silanes as New Highly Efficient Co-initiators for Radical Polymerization in Aerated Media

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References

Radiation curing in polymer science and technology

Radiation curing in polymer science and technology offers various applications, including UV curing, electron beam curing, and ion beam curing, with various photoinitiators and polymeric photoinitiators.

Mechanisms of photophysical processess and photochemical reactions in polymers : theory and applications

Photophysical processes and photochemical reactions in polymers can be used to create photochromic, photoreactive, and photocuring polymers for image formation, solar energy conversion, and photocuring.

Handbook of photochemistry

This handbook provides comprehensive information on the photophysics of organic molecules in solution, covering various aspects such as triplet-state energies, rate constants, and solvent properties.

Citations

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Physicochemical properties of experimental resin-based composites using tris(trimethylsilyl)silane associated with diphenyl iodonium hexafluorophosphate (DPIHP) salt.

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