The refractive index increment, dn/dc, is an important material specific parameter of a polymer solution and is required for evaluating light scattering data. If this parameter is unknown for a given 'polymer-solvent' system, it has to be measured, because the light scattering formula includes dn/dc to the power of two in the calculation of molar mass.
PSS can determine the refractive index increment at 620, 535, or 470 nm with excellent precision.
Request quote for sample testing
Customers from USA and Canada can use the online store and pay with credit card:
- Print and fill out the sample testing evaluation form, to be sent with the samples