I am sry, but poppy is not a tank.
She is an assassin, that means you should build her like that.

I tried many builds... and tank is definitely not a good way to play poppy effectively... A main reason for that is her low cc.... which is additionally unreliable in teamfights. You shouold better forget about this idea.

Cheat Sheet: Your build look fairly decent it could work for you I haven't personally tried it but I have a couple of suggestions for you to try on Poppy. You might want to change your marks to greater mark of desolation marks don't really go well with defensive attributes. You could also try switching out Leviathenfor Frozen Mallet for the extra tankiness. Just a suggestion (:

Guide: You know basic coding which is good but you could get a little more creative with it so it can be a little easier to read and understand the information in it. Its not necessary but preferred but most members. Add optional runes,masteries,items, and spells. Not everybody plays the person in the same way and you could give new Poppy players a general idea of what to put with her if they don't like your recommended spell,items,runes,etc.

Review: Decent build, I can see some time went into it but a little more could go into it. +1 from me(: