Evaluation of a Potential Ionic Contribution to the Polymerization of Highly Reactive (Meth)acrylate Monomers
| Autor: | Jeffrey W. Stansbury, Eric R. Beckel, Christopher N. Bowman |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Kinetic chain length
Polymers and Plastics Chemistry Organic Chemistry technology industry and agriculture Cationic polymerization Chain transfer macromolecular substances Photochemistry Ring-opening polymerization Inorganic Chemistry Anionic addition polymerization Polymerization Polymer chemistry Materials Chemistry Suspension polymerization Ionic polymerization |
| Zdroj: | Macromolecules. 38:9474-9481 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma050445d |
| Popis: | Monovinyl methacrylic and acrylic monomers that exhibit enhanced photopolymerization reactivities were studied to discern a possible secondary polymerization mechanism that involves an anionic contribution to the polymerization. To test for this possible anionic contribution, a strong acid, methanesulfonic acid, was added in small quantities to each of the (meth)acrylic monomers, and the steady-state photopolymerization rate was monitored. Initial control studies with conventional free-radical polymerizing monomers showed that the polymerization rate of these conventional (meth)acrylic monomers are not affected by small amounts of acid. Acid studies of secondary functionalized (meth)acrylate monomers, which typically exhibit rapid polymerization kinetics, demonstrated that the polymerization rate is decreased in these monomers by the addition of the strong acid. More specifically, the acid addition had a greater inhibitory effect on the monomers with faster bulk polymerization rates. The acid addition had... |
| Databáze: | OpenAIRE |
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