Synthesis and Characterization of UV‐Curable Poly(dimethylsiloxane) Dimethacrylate

Abstract

AbstractThis paper presents a new route to the synthesis of UV‐curable poly(dimethylsiloxane) dimethacrylate (PDMSDMA). PDMSDMA was essentially prepared by modification of poly(dimethylsiloxane), bis(3‐aminopropyl) terminated (PDMS‐NH2) with methacrylic anhydride (MAA). The synthesized products were cured under UV in the presence of camphorquinone (CQ) used as a photoinitiator. The chemical structure of PDMSDMA samples was analyzed by FT‐IR and 1H‐NMR spectroscopy. The 1H‐NMR spectrum of PDMSDMA revealed new peaks at 3.20 ppm, corresponding to methylene protons in CH2NH, and 5.25 and 5.65 ppm, corresponding to vinylic protons in NHCOCCH3CH2. The chemical structure of the cured products and the degree of curing were determined by solid state 13C CP/MAS NMR and FT‐IR (Micro‐ATR) spectroscopy. Various parameters, such as concentration of methacrylic anhydride, amount of camphorquinone, and curing time, were studied.