7. Which of the following addition polymers results from the reaction below? nCF

Question

7. Which of the following addition polymers results from the reaction below? nCF2-CF2---->(Catalyst) ?

A) [ CF-CF ]n B) [CF3-CF3]n C) [-CF2-CH CHCF2-]n D) [-CF2-CF2-]n E) [-CF2 CF2-]n

8. Which of the following species can best serve as a radical initiator for radical polymerization?

A) ROH B) ROR C) ROOR D) RCOOR E) RCOOH

9. Which of the following species can best serve as an initiator for cationic polymerization?

A) ROOR B) ROH C) ROR D) AlCl3 E) RCOOR

10. Which of the following monomers is least likely to undergo cationic polymerization?

A) propylene B) isobutylene C) styrene D) methyl acrylate E) vinyl acetate

Explanation / Answer

7 ) answer : D) [-CF2-CF2-]n

8) answer : C) ROOR

9 ) answer : D) AlCl3

10 ) answer : D) methyl acrylate

explanation:

for 8)

for radical polymerization we need peroxide.

for 9)

for cationic polymerization we need lewis acid

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