Polymerization initiation of pure 2-hydroxyethylmethacrylate under shock wave compression

0556888 - FZÚ 2023 RIV GB eng J - Journal Article
Jia, Z.X. - Museur, L. - Traore, M. - Perruchot, Ch. - Brajer, Jan - Böhm, Marek - Kanaev, A.
Polymerization initiation of pure 2-hydroxyethylmethacrylate under shock wave compression.
New Journal of Chemistry. Roč. 46, č. 19 (2022), s. 9258-9263. ISSN 1144-0546. E-ISSN 1369-9261
R&D Projects: GA MŠMT EF15_006/0000674
EU Projects: European Commission(XE) 739573 - HiLASE CoE; European Commission(XE) 871124 - LASERLAB-EUROPE
Grant - others:OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : polymerization * pHEMA * high pressure processing * shock wave pressure
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.3, year: 2022
Method of publishing: Limited access
https://doi.org/10.1039/D1NJ06228J

The ability to initiate chemical reactions without the need for potentially hazardous solvents, catalysts and radical initiators is of key importance for modern biotechnologies and medicine. In this study, laser-driven shock wave compression was performed on pure 2-hydroxyethylmethacrylate (HEMA) free of any additives in order to trigger the polymerization process. We showed that the generated peak shock-wave pressure in the range between 2 and 5.5 GPa permitted initiation of radical polymerization and the formation of poly-HEMA oligomers. The reaction begins with diradicals HEMA2˙˙ appearing at the peak pressure and, by reactions with HEMA monomers, forming HEMA3˙˙ diradicals on the 15 ns timescale. The chain propagation further occurs on the sub-μs timescale by associations of the trimer diradicals, which, because of a smaller reactivity, do not react with HEMA monomers. The proposed method can be considered for scale-up of the polymerization process of ultrapure organics.
Permanent Link: http://hdl.handle.net/11104/0331532