Assignment

Read the file Polymer Chemistry$-$Practice Problem$-$PEO to understand the background of the assignment, and write your answers for the following questions based on the discussions in this classroom for the file, class contents $($definition$),$ and literature cited below, and based on your investigation into the literature cited below.

Draw the resulting chemical structures of the products $[$Product $(1),$ Product $(2),$ Product $(3),$ and Product $(4)]$ obatined from each reaction step.

Note $1.$ PPO$-$b$-$PEO$-$b$-$PPO: triblock copolymer,

Poly$($propylene oxide$)-$b$-$poly$($ethylene oxide$)-$b$-$poly$($propylene oxide$)$

Note $2.$ IPDI: isophorone diisocyanate

Hint: Consider the reaction between $OH$ and NCO.

Nature Commun. $2019,10,5384($including Supplementary Information$)$

b$.$ Second reaction step

Hint:

Consider the reaction between $OH$ and NCO.

Consider the reaction between amine and NCO.

Nature Commun. $2019,10,5384($including Supplementary Information$)$

c$.$ Draw the chemical structures of the Product $(4)$