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The phase separation of a 10% aqueous pNIPAM solution ($\overline {M} _{{\rm w}} $ = 270 000 g mol−1) is studied by measuring the viscosity as function of temperature at different shear rates. While heating above the LCST of pNIPAM and simultaneously applying shear the influence of a nonionic surfactant on the resulting polymer dispersion is observed. Without surfactant the pNIPAM solution precipitates...
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