Summary
The temperature dependence of the second virial coefficient and intrinsic viscosity of statistical copolymers of methyl methacrylate and methacrylic acid in 2-ethoxyethanol was investigated. It was found that the θ-temperatures of copolymers are outside the temperature range given by the θ-values for poly(methacrylic acid) and poly(methyl methacrylate). Their dependence on the copolymer composition has a discontinuity. Simple theoretical considerations have shown that this behaviour may be expected with copolymers composed of monomer units dissolving, respectively, with absorption and evolution of heat.
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Horský, J., Petrus, V. & Bohdanecký, M. Effect of temperature on the solution properties in 2-ethoxyethanol of statistical copolymers of methacrylic acid and methyl methacrylate. Polymer Bulletin 17, 551–556 (1987). https://doi.org/10.1007/BF00283092
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DOI: https://doi.org/10.1007/BF00283092