Synthesis of a New Phosphonated Dimethacrylate: Photocuring Kinetics in Homo‐ and Copolymerization, Determination of Thermal and Flame‐Retardant Properties

摘要: In this work, we describe the synthesis of a new dimethacrylate phosphonate monomer by condensation methacryloyl chloride with diol resulting from radical addition allyldiethyl 3-mercapto propane-1,2-diol. The photochemical polymerization was first studied as function reaction temperature. optimal conversion photopolymerization 63% at 70°C. This is less reactive than commercial polyether Bisphenol A, that have used for copolymerization. mechanical and thermal properties final material were content. ultimate slightly decreases (from 72 to 55%) glass transition temperature drops 44 –26°C when phosphorus content increases. leads an improvement flame-retardant properties, i. e. significant decrease in degradation rate (factor 4.5) high increase amount residue remained after combustion (15% 2.5% copolymer). Moreover, Limited Oxygen Index (LOI) increased 16.9 (0% P) 21.5 (2.5% P).