Journal article
The influence of N-vinyl pyrrolidone on polymerization kinetics and thermo-mechanical properties of crosslinked acrylate polymers
Journal of polymer science. Part A, Polymer chemistry, Vol.45(17), pp.4062-4073
09/01/2007
DOI: 10.1002/pola.22173
Abstract
Polymerization of multifunctional acrylate monomers generates cross-linked polymers that are noted for their mechanical strength, thermal stability, and chemical resistance. A common reactive diluent to photopolymerizable formulations is N-vinyl pyrrolidone (NVP), which is known to reduce the inhibition of free radical photopolymerization by atmospheric oxygen. In this work, the copolymerization behavior of NVP was examined in acrylate monomers with two to five functional groups. At concentrations as low as 2 wt%, NVP increases the polymerization rate in copolymerization with multifunctional acrylate monomer. The relative rate enhancement associated with adding NVP increases dramatically as the number of acrylate double bonds changes from two to five. The influence of NVP on polymerization kinetics is related to synergistic cross-propagation between NVP and acrylate monomer, which becomes increasingly favorable with diffusion limitations. This synergy extends bimolecular termination into higher double bond conversion through reaction diffusion controlled termination. Copolymerizing concentrations of 5-30 DB% NVP with diacrylate or pentaacrylate monomer also increases Young's modulus and the glass transition temperature (Tg) in comparison to neat acrylate polymers. © 2007 Wiley Periodicals, Inc.
Details
- Title: Subtitle
- The influence of N-vinyl pyrrolidone on polymerization kinetics and thermo-mechanical properties of crosslinked acrylate polymers
- Creators
- Timothy J White - University of IowaWilliam B Liechty - University of IowaC. Allan Guymon - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of polymer science. Part A, Polymer chemistry, Vol.45(17), pp.4062-4073
- Publisher
- Wiley Subscription Services, Inc., A Wiley Company
- DOI
- 10.1002/pola.22173
- ISSN
- 0887-624X
- eISSN
- 1099-0518
- Number of pages
- 12
- Language
- English
- Date published
- 09/01/2007
- Academic Unit
- Chemical and Biochemical Engineering
- Record Identifier
- 9984197213502771
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