If I have two polymer samples, both of the same formulation and relative viscosity, but one sample has a much higher amine end number than the other, can I assume that the sample with higher amine ends has a higher degree of chain branching?
Not necessarily. Did the precursors allow for branching (polyamines?)? Nylons wouldn't usually be expected to have branching like polyethylenimine.
It can also be difference in polydispersity. A sample with low polydispersity will have a certain viscosity and two amine ends per chain. With a much larger polydispersity, the viscosity comes from a small number of high MW chains, but with a large number of low MW chains (each with 2 amine ends) the number of amine ends per gram is higher.
Hello dear, I think that it will depend on the position of the amine if your structure, because if the amine groups are side groups of the linear chain and they reacted with another group, in this case you can make that inference.
if you have same molecular weight, higher amine end shows branching.
as the branch polymer has low viscosity than linear polymer so maybe this two polymers are not comparable.
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