Citation:
. SYNTHESIS AND PROPERTIES OF TRANSPARENT THIODIGLYCOL DIMETHACRYLATE COPOLYMER RESINS*[J]. Chinese Journal of Polymer Science,
;2004, 22(1): 25-30.
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The title compound, thiodiglycol dimethacrylate (TDGDMA), was synthesized from thiodiglycol and methacryloyl chloride by phase transfer catalysis reaction, and its structure was confirmed by FTIR and 1H-NMR analyses. TDGDMA possesses good polymerizability to produce a homopolymer resin with excellent transparency (T%, 90), moderate refractivity (nd20, 1.55), lower dispersivity (Abbe's number, 50.6) and higher glass transition temperature (Tg, 119℃). Through copolymerization with styrene (St) or styrene-4,4'-bismethacryloyloxydiphenylsulfone (BPSDMA), many properties of the copolymer such as refractive index, Abbe's number, strength, onset wavelength in the UV region and density were significantly modified. A copolymer resin with balanced properties between refractive index and dispersion was produced at the weight ratio of TDGDMA:St:BPSDMA (25:50:25), where nd20 and Abbe's number are 1.5815 and 36.5, respectively.
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