Please see the attached reference which gives easy to follow information about determining the viscosity average molecular weight of a polymer.

There are "older" references which give more information but they are not available with me now.

http://vlab.amrita.edu/?sub=2&brch=190&sim=603&cnt=1

Hello Kolli,

Determining viscosity very much depend on the instrument you have at the institution.  

Please describe what you have and then it is easier to Taylor a method for it

We have Ostwald Viscometer which is using for undergraduate level. We are giving few liquids whose density is known where as my case density is not known. Plz suggest me.

Thank you, Prof. Nizar Matar, for your link. I got regarding viscosity where I am not getting Mv as Mark-Houwink equation requires K and α values. For new polymer how to get these. Please suggest anyone.

I have generically discussed the temperature dependency of either the dynamic or kinematic viscosity for polymers ― based on the Williams-Landel-Ferry model ― elsewere at this forum: https://www.researchgate.net/post/How_to_measure_instrument_name_Density_Thermal_Expansion_and_Thermal_Conductivity_of_liquid_polymers_ie_polyethylene_experimentally https://www.researchgate.net/post/Viscosity_of_isotactic_polypropylene_at_various_levels_of_processing_temperature https://www.researchgate.net/post/Is_there_any_direct_relation_between_surface_tension_viscosity_and_temperature https://www.researchgate.net/post/What_is_the_correlation_of_Tg_Tm_values_with_Hot_Melt_Extrusion

Dear Kolli,

I only saw your reply to my answer now. To find the K & a values in Mark-Houwink equation , please follow the procedure given in the attached file. This means more work but it is worthy & you may get good results. Wishing you success in your research project.

Thank you sir for your support and wishes