Polymer paperA mechanism describing polyamic acid solution viscosity change on storage at high temperature
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2020, PolymerCitation Excerpt :This interaction can be changed due to physical relaxation during storage, and this can also lead to the reduction of poly(amic acid) viscosity. An alternative way to gain absolute molecular weight is by static light scattering (SLS) method [12–14]. However, to apply SLS, the increment of refractive index is required as one input parameter, which is not a constant when the solution is going through a thermodynamic/kinetic transition.
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