Synthesis and characterization of multiarm (Benzoin-PS)m-polyDVB star polymer as a polymeric photoinitiator for polymerization of acrylates and methacrylates |
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| Authors: | Duygu Sevinc Esen Nese Cakir Yigit Umit Tunca Gurkan Hizal Nergis Arsu |
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| Institution: | 1. Art and Science Faculty, Department of Chemistry, Yildiz Technical University, Yildiz, Istanbul, Turkey;2. Art and Science Faculty, Department of Chemistry, İstanbul Technical University, Maslak, Istanbul, Turkey |
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| Abstract: | In this study, a new benzoin-based multi-arm star polymer was synthesized by using ATRP, and characterization was achieved by spectrophotometric and chromatographic methods. Obtained multiarm (Benzoin-PS)m-polyDVB star polymer was employed as a polymeric photoinitiator for polymerization of methacrylates and acrylates. Photophysical properties of this initiator were determined by fluorescence and phosphorescence measurements, the phosphorescence lifetime was calculated as 29 ms hence the lowest triplet state nature was n-π* character, and laser flash photolysis technique was additionally used to get more information about triplet state and triplet lifetime which was calculated as 1.34 ms. Photokinetics of difunctional acrylate such as HDDA was studied with a multi-arm (Benzoin-PS)m-polyDVB star polymeric initiator using Photo-DSC. |
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| Keywords: | benzoin free radical polymerization polymeric photoinitiator star polymer |
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