Syntheses and viscoelastics properties of two-stage-cured segregated epoxy-acrylate networks
The course of two-stage curing of several compositions containing epoxide resin, oligo(urethane acrylate), methyl methacrylate and methacrylic acid has been investigated. The first stage of cross-linking of the systems under study is characterized by a definite range of gel formation, commencing with the formation of micro-gel ending with the formation of a homogeneous polymeric network accompanied by a rapid increase In viscosity of the system. The rate of cross-linking depends on the chemical structure of the network being formed. The studies of the viscoelastic characteristics of polymers thus-formed have demonstrated the fact of a high-extent microphase segregation of the components forming the polymer network.
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