Squaric acid derivative effects on the kinetics of photopolymerization of different monomers
| Autor: | Katarzyna Jurek, Janina Kabatc, Katarzyna Kostrzewska |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Tetramethylammonium
General Chemical Engineering Cationic polymerization 02 engineering and technology General Chemistry TMPTA 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Photopolymer Monomer chemistry Polymerization Polymer chemistry Photosensitizer 0210 nano-technology Cyclohexene oxide |
| Zdroj: | RSC Advances. 6:74715-74725 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c6ra17533c |
| Popis: | Systems composed of 1,3-bis(phenylamino)squaraine (photosensitizer) and conventional free radical sources, such as tetramethylammonium n-butyltriphenylborate, diphenyliodonium chloride and diphenyliodonium hexafluorophosphate were used for initiation of photopolymerization occurring via a radical or cationic mechanism. The photopolymerization of 1,6-hexanediol diacrylate (HDDA), pentaerythritol triacrylate (PETA), 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate (TMPTA), cyclohexene oxide (CHO) and 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate (EPOX) were carried out at 300 nm < λ < 500 nm irradiation. The polymerization kinetics was measured using a differential scanning calorimeter equipped with a high-pressure mercury lamp. The effect of co-initiator structure and type of monomer on the kinetics of the photopolymerization process is also presented here. It was found that the photoredox pairs, consisting of 1,3-bis(phenylamino)squaraine and tetramethylammonium n-butyltriphenylborate or diphenyliodonium salts, initiate radical and cationic polymerization in the UV-Vis light region. The photoinitiating ability of these new photoinitiating systems acting in the UV-Vis light region for initiation of polymerization of acrylates and epoxides was compared with a few commercially used photoinitiating systems. |
| Databáze: | OpenAIRE |
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