Abstract
Copolymerizations of two methacryl-terminated siloxane macromers (M n=4000 and 23,00 g/mol) with styrene monomer were studied as a model of how reactive silicones may cross-link with unsaturated polyesters. Significant differences were found between the two macromers in the nature of the polymerization, the rate of reaction, the cloud point, and the products formed. The lower molecular weight macromer freely cross-links to form an insoluble three-dimensional network with styrene. The high molecular weight macromer reacts at only one terminal methacryl group and so forms a two-dimensional copolymer with styrene which melts like a thermoplastic and is soluble in organic solvents such as chloroform.
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Duplock, S.K., Swincer, A.G., George, G.A. et al. Synthesis and reactions of methacryl-substituted siloxane macromers. J Inorg Organomet Polym 1, 581–590 (1991). https://doi.org/10.1007/BF00683518
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DOI: https://doi.org/10.1007/BF00683518