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incorporation of the hetero-aromatic group carbazole into novel methacrylates, acrylates, and dimethacrylates (Schemes 1.2 and 1.3, Chapter 1, p.5, p.8) to produce polymers with high refractive indices and other desirable properties.213

O

O

O

S

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X

X = O or S

O

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O

O

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Figure 2.17 Examples of Sulfur Containing Dimethacrylates214

2.5 Heat of Polymerization Using Photo-DSC

Gunduz and McGrath, et al., monitored the rapid exothermic heat of photopolymerization for four novel dimethacrylates, which were analogues of BisGMA.215,216 A Perkin Elmer DSC 7 equipped with a double beam

213 McGrath, J.E.; Rasmussen, L.; Shobha, H.; Sankarapandian, M.; Uhrich, K.E., Polym. Prepr., 2000, 41(2), 1363. Shobha, H., “Synthesis and Characterization of New Dimethacrylate Monomers for Optical Applications,” Group Presentation, Virginia Tech, Blacksburg, VA, March 27, 1999. 215Gunduz, N., Synthesis and Photopolymerization of Novel Dimethacrylates, M.S. Thesis, Virginia Tech, Blacksburg, VA, 1998. Gunduz, N.; Shultz, A.R.; Shobha, H.K.; Sankarapandian, M.; McGrath, J.E., Polym.Prepr., 1998, 39(2), 647. 214 216

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