Which one of the following is the correct structure for poly(methyl $\alpha$-cyanoacrylate?
A) I
B) II
C) III
D) IV
E) none of these

Question

Which one of the following is the correct structure for poly(methyl $\alpha$-cyanoacrylate? 
A) I 
B) II 
C) III 
D) IV 
E) none of these

Quizplus · Accepted Answer

Poly(methyl cyanoacrylate) is a polymer formed by the polymerization of methyl cyanoacrylate monomer. The monomer has a structure as shown below: 
CH2=C(CN)COOCH3 
Polymerization occurs via addition polymerization, where monomer molecules add to the growing polymer chain. Therefore, the repeating unit of the polymer would be: 
[-OOC(CH3)=C(CN)CO-]n 
Choice B is the only structure that shows this repeating unit.

Which One of the Following Is the Correct Structure for Poly(methyl