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Synthesis and characterization of copolymers of styrene andN-methylolacrylamide

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Copolymers of styrene (ST) and N-methylolacrylamide (NMA) were synthesized by emulsion polymerization for different initial weight ratios of ST/NMA. Fast reaction rates and high conversions are achieved regardless of the ST/NMA ratio. NMA content in copolymers, as deduced by DSC, FTIR and Kjeldhal analysis, is higher as the initial ST/NMA ratio decreases. Glass transition temperature of copolymers increases as the ST/NMA ratio decreases and it decreases with reaction time for a fixed ST/NMA ratio. The latter results and FTIR spectra as well as Kjeldhal analysis as a function of reaction time indicate that NMA reacts initially in the aqueous phase, after which ST, because of its overall larger concentration, is incorporated preferentially in the polymer.

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Correspondence to E. Mendizabal.

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Frias, J.B., Lopez, F.J., Alonso, N. et al. Synthesis and characterization of copolymers of styrene andN-methylolacrylamide. Polymer Bulletin 31, 285–291 (1993). https://doi.org/10.1007/BF00692953

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  • Polymer
  • Reaction Time
  • Transition Temperature
  • FTIR Spectrum
  • Aqueous Phase