2-Ethyl mercaptoethyl methacrylate

Figure 9 shows the results of the final polymerization of methyl methacrylate at 120 C initiated with AIBN in the presence of different thioethers as chain transfer agents. While the low molecular weight thioether (di-tert-butyl sulfide) reduces the final conversion by about 2% as compared with the thioether free system, 2-ethyl mercaptoethyl methacrylate which copolymerizes with methyl methacrylate has only a moderate effect ( 0.5%). Influences of these thioethers on the initial course of the polymerization were not observed, at least not at the concentrations used in this work. 

Figure 9. The final conversion in MMA pol3nn-erization with 0.1% AIBN at 120 C. Influence of thioethers = Di-tert-butyl sulfide, 0.2% o = 2-Ethyl mercaptoethyl methacrylate ------------- ...

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