An apparatus for turbidimetric measurements of demixing temperatures under shear flow is presented, and the results of experiments with trans‐decahydronaphthalene/polystyrene (TD/PS) solutions, investigating molecular weights ranging from 100 kg/mol to 1770 kg/mol, are compared with viscometric data. It is found that the sign and magnitude of shear effects depend on molecular weight (Mw), polymer concentration (c2), and shear rate ( ). For the first time, it was possible to study a solution which exhibits shear dissolution at low shear rates but shear demixing at high shear rates.
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Krämer‐Lucas et al. (1988) studied this question.
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