Chemical copolymers Styrene-methylmethacrylate copolymer

Fawcett, A. H. Foster, A. B. Hania, M. Hohn, M. Mazebedi, J. L. McGaffery, G. O. Mullen, E. Toner, D. Silicone Graft Copolymers with Acrylonitrile, Ghloroprene, Styrene, Methylmethacrylate, and an Olefin. In Synthesis and Properties of Silicones and Silicone-Modified Materials-, Clarson, S. J., Fitzgerald, J. J., Owen, M. J., Smith, S. D., Van Dyke, M. E., Eds. ACS Symposium Series 838 American Chemical Society Washington, DC, 2003 pp 318-328. 

Polymer-based materials have been on the market for more than 30 years. Crosslinked styrene-divinylbenzene and methylmethacrylate copolymers are the most widely used. These materials show high pH stabihty and chemical inertness. Their rigidity and resistance to the swelhng in different mobile phases is dependent on the degree of crosslinkage. 

The chemical composition of the prepolymer also affects the tensile properties of the networks. Effects of incorporation of styrene in copolymers of 2-hydroxyethylmethacrylate with methylmethacrylate are illustrated in Fig. 1. A series of terpolymers containing 35 percent of 2-hydroxyethylmethacrylate 5 to 65 percent styrene and the balance methylmethacrylate were crosslinked with a caprolactam blocked triisocyanate. The elongation-to-... 

OFM are viscous liquids, or readily fusible resinTike substances, capable (in the presence of intiators or upon irradiation) of three-dimensional radical copolymerization with several active monomers (styrene, vinyltoluene, methylmethacrylate and others). The properties of the network copolymers formed largely depend on the chemical nature of the reagents and the copolymerization conditions. Hardening of OFM may be carried out at room temperature, or even lower, using mixtures... 

An important parameter in phase behavior of polymer systems is the chemical composition of the chains. For example, in Schmitt el al. s work on the miscibility of poly(methylmethacrylate) and poly(styrene-co-acrylo-nitrile) [82] it was found that a minute change in the chemical composition of the statistical copolymer splits the single lower-critical miscibility gap into two and adds an upper consolute two-phase range. 

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