CHEM 4214 Lecture Notes - Lecture 25: Dispersity, Russian Locomotive Class Te3, Volumetric Flow Rate
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Chem4212 polymers page 1 once we find viscosity, then we can find intrinsic viscosity. => mv btwn 40s and 70s, this was the number 1 method limit as concentration --> 0 quiz: we said we then get thus, size exclusion chromatography (sec) Gel permeation chromatograph (gpcsame as sec) most important one used in lab, most widely used measures fast (less than 30 min), simple to use, automated. Gives info of molecular weight distribution but disadvantages low resolution (maldi is better for resolution) Basic principle of sec separation of polymer chain by vh (size of polymer) last class: Using porous particles small particles can go through holes, larger ones can"t. For this to work, the pore size should be around the size of the polymer ~ 10-104 angstroms. In reality, have series of columns each column has different pore size large-pore particles medium small detector sees what size of polymers we have.
