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Wednesday, 30 September 2020
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Raw materials & technologies, Technologies

Highly efficient UV-Vis light activated three-component photoinitiators

Tuesday, 8 September 2020

A recent study reports on UV-Vis light activated three-component photoinitiators composed of tris(trimethylsilyl)silane for the polymerisation of acrylates.

UV-Vis light activated three-component photoinitiators have been described. Image source: totojang1977 – stock.adobe.com (symbol image).

UV-Vis light activated three-component photoinitiators have been described. Image source: totojang1977 – stock.adobe.com (symbol image).

The paper concerns the evaluation of the efficiency of novel three-component systems for initiating the photopolymerisation process of 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate (TMPTA). Combinations of 1,3-bis(phenylamino)squaraine (SQG1) with different types of co-initiators are proposed as effective UV-Vis light photoinitiators.

The co-initiators used in the experiments, such as silane (TTMSS), borate salt (B2), carbazole (NVC) and a set of iodonium salts (I1, I2, I77, I81), are active radical sources for initiation of the polymerisation of TMPTA.

Optimal photoinitiator concentration indicated

The effect of the composition of the system on the photopolymerisation kinetics was analysed. The optimal photoinitiator concentration that gives high monomer conversions and high values of the rate of polymerisation is indicated.

The study has been published in Polymer Chemistry, Issue 34, 2020.

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